A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent files or records, but otherwise reserves all copyright rights whatsoever.
This description relates to gaming systems and machines having a curved display.
Gaming machines have been developed having various features to capture and maintain player interest. Some features are directed to increasing or providing the player with the opportunity to win larger sums of money. For example, gaming machines may include second chance games that provide a player with additional opportunities to obtain a winning outcome. Alternatively, gaming machines may be tied into progressive gaming systems that award large progressive jackpots.
In addition to providing players with more opportunities to obtain a winning outcome or win a large sum of money, gaming machines have increased the number of features and grown in sophistication in order to increase player participation or interest in a game. For example, the mechanical reels of traditional gaming machines have been replaced with video depictions of spinning reels. These video gaming machines provide a richer gaming experience for players by including graphics or animation as part of the game. However, overly complex video displays on a gaming machine may turn off player participation because players become frustrated with the game or are unwilling to learn or decipher all the information provided on the video display. Accordingly, there is a continuing need for slot machines variants that provide a player with enhanced excitement without departing from the original slot machine gaming concept.
Briefly, and in general terms, various embodiments are directed to gaming machines having video depictions of one or more mechanical reels projected onto a curved display. In one embodiment, the gaming machine includes a curved transparent material having an outer surface, an inner surface, and a radius of curvature similar to a mechanical reel. The curved transparent material further includes a glossy finish on the outer surface of the curved transparent material to provide a reflective surface. The gaming machine also includes a light emitting diode projector for projecting video images of one or more reels onto the inner surface of the curved transparent material. The gaming machine also has a liquid crystal display having an opening in which the curved transparent material extends through the opening of the liquid crystal display.
In another embodiment, the gaming machine includes a piece of curved transparent material having an outer surface, an inner surface, and a radius of curvature similar to a mechanical reel. The curved transparent material also has a glossy finish on the outer surface of the curved transparent material. The gaming machine also includes a light emitting diode projector for projecting video images of one or more reels onto the curved transparent material. Additionally, a front-coated mirror is positioned between the light emitting diode projector and the curved transparent material in which the front-coated mirror reflects the video images from the light emitting diode projector onto the curved transparent material. In this embodiment, the gaming machine also has a lens positioned between the light emitting diode projector and the front-coated mirror.
In yet another embodiment, the gaming machine includes a piece of curved material approximating a radius of curvature similar to a mechanical reel. The curved material is transparent and has an outer surface and an inner surface. The gaming machine also includes a light emitting diode projector for projecting images of one or more reels onto the inner surface of the curved material. The gaming machine further has a video display screen having an opening, in which the curved material extends through the opening of the opening of the video display screen. The gaming machine also includes a secondary display positioned above the curved material in which the light emitting diode projector projects one or more video images onto the secondary display.
In another embodiment, the gaming machine includes a curved transparent material having an outer surface, an inner surface, and a radius of curvature similar to a mechanical reel. The curved transparent material further has a glossy finish on the outer surface of the curved transparent material to provide a reflective surface. The gaming machine also includes a flat transparent material around the perimeter of the curved transparent material, wherein the flat transparent material presents game information. The gaming machine is also provided with light emitting diode projector that projects video images of one or more reels onto the inner surface of the curved transparent material as well as game information onto the flat transparent material.
In yet another embodiment, a gaming machine includes a gaming cabinet defining an interior space. The gaming machine also includes a projection enclosure positioned within the interior space of the gaming cabinet. The projection enclosure has a curved transparent material provided on a front surface of the projection enclosure. Within the enclosure, a first mirror is spaced apart from the light emitting diode projector, and a second mirror is positioned in the back of the enclosure. The video images from the light emitting diode projector are reflected off the first and second mirrors onto the curved transparent material. The gaming machine further includes a touch screen positioned in front of the curved transparent material, wherein the touch screen produces touch data when activated.
Another embodiment is directed to a self-contained projection system for a gaming machine. The self-contained projection system includes an enclosure having one or more interior walls with a light absorbing coating applied thereon. A curved material is coupled to the front of the enclosure. The curved material is generally transparent and has an outer surface and an inner surface. The curved material also approximates the radius of curvature of a mechanical reel. The self-contained projection system also includes a light emitting diode projector fixed within the enclosure. The light emitting diode projector presents images of one or more reels on the curved material. Within the enclosure, one or more mirrors are positioned between the piece of curved material and the light emitting diode projector, wherein the mirrors reflecting the image of the one or more reels on the curved material.
In addition to gaming machines, various embodiments of a gaming system having touch panels as user control devices are disclosed herein. According to one embodiment, the gaming system includes a curved display system for displaying a game. The curved display system has a curved material having an outer surface, an inner surface, and a radius of curvature similar to a mechanical reel. The curved display system also includes a digital light projection device for projecting images of one or more reels onto the curved material. The gaming system also includes a touch screen system positioned in front of the curved material. The touch screen system includes a touch sensor assembly having a substantially transparent touch panel that produces touch data when activated, a touch panel controller for controlling and interpreting the touch data, and touch panel software for controlling and interpreting touch data.
In another embodiment, the gaming system includes a curved display system for displaying a game. The curved display system has a curved material having an outer surface, an inner surface, and a radius of curvature similar to a mechanical reel. The curved display system also includes a digital light projection device for projecting images of one or more reel strips onto the curved material. The gaming system also includes a touch screen system positioned in front of the curved material. The touch screen system has a touch sensor assembly having a substantially transparent touch panel that produces touch data when activated, a touch panel controller for controlling and interpreting the touch data, and touch panel software for controlling and interpreting touch data. The touch panel is configured to select one or more pay lines for the game.
In yet another embodiment, the gaming system includes a curved display system for displaying a game. The curved display system has a curved material having an outer surface, an inner surface, and a radius of curvature similar to a mechanical reel. The curved display system also includes a digital light projection device for projecting images of one or more reel strips onto the curved material. The gaming system also includes a touch screen system positioned in front of the curved material. The touch screen system has a touch sensor assembly having a substantially transparent touch panel that produces touch data when activated, a touch panel controller for controlling and interpreting the touch data, and touch panel software for controlling and interpreting touch data. The touch panel is configured to add reel strips to the game, remove reel strips from the game, add game indicia to the reel strips, or remove game indicial from the reel strips.
Other features and advantages will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which illustrate by way of example, the features of the various embodiments.
Various embodiments are directed to gaming machines having video depictions of one or more mechanical reels projected onto a curved display. According to one embodiment, a digital light processing (DLP) projector that presents video images of one or more reels on the curved display. In one embodiment, the curved display is shaped to simulate the look of mechanical reels. Additionally, the high resolution of the DLP projector presents video images that give a player the impression that the combination of the curved display and the video images are physical, mechanical reel strips.
In other embodiments, shrouds (either physical or video-depictions of the shrouds) may be placed between the video depiction of the reels to provide a more realistic impression of mechanical reels. Optionally, the gaming machines may include other audio and visual features to enhance the perception that the video images and curved display are mechanical reels. For example, the video images may shudder to simulate the torque of stopping the spinning mechanical reels. Alternatively, the video images may have visual imperfections to simulate mechanical reels. Furthermore, audio sound effects may be coordinated with the movement and stopping of the reels to further simulate a gaming machine having mechanical reels.
Because the gaming machine is video-based, the gaming machine also maintains the flexibility of a video gaming machine. For example, the DLP projector may present pay lines directly on and/or around the symbols that comprise a winning outcome. The pay lines may be animated or otherwise highlight the winning combination of symbols. Optionally, the winning symbols may be animated on the “virtual” reel strip. For example, the symbols that form a winning pay line may interact with one another or the symbols may be emphasized by expanding the size of the symbol. Alternatively, a short animated movie may be presented at one or more of the game indicia on a winning pay line. In another embodiment, the images of the game indicia on the “virtual” strips may be altered so that a “wild” symbol morphs into the game indicia that forms a winning combination. For example, a “wild” symbol may morph into a “7” to complete a winning combination of “7-7-7.” In yet another embodiment, the reel strip color may be altered in response to a particular game outcome or trigger for a bonus game.
Referring now to the drawings, wherein like reference numerals denote like or corresponding parts throughout the drawings and, more particularly to
It is contemplated that the video image 16 may present any number of reels ranging from one reel to five or more reels. In another embodiment, the gaming machine may include a combination of one or more mechanical reels and video images of one or more reels presented on a curved display. The DLP device may project one or more video images 16 onto the curved display 12. Accordingly, it is possible to present a game that is a combination of mechanical reels as well as video reels. The video reels may be part of the primary game or may be presented as a portion of a secondary game.
As shown in
The primary LCD display 38 may be used to display buttons and lights, pay line indicators, and other game information such as, but not limited to, credits available, credits won, wager size, wager per pay line, or wager denomination. The secondary LCD display 24 may be used to display other game related information such as, but not limited to, one or more bonus games, pay tables, game theme information, jackpot information, progressive jackpot information, jackpot meters, or the like. The secondary LCD 24 may also display non-gaming related information such as, but not limited to, player account information, advertisements, casino promotions, news, one or more sporting events, or the like.
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In another embodiment, the glossy coating 58 may be replaced with a gradient coating provided on the outer and/or inner surfaces of the curved material 12. The gradient coating provides greater depth of the image projected onto the curved material. The gradient coating may be darker at the periphery of the curved material 12 and lighter in the middle of the curved material. Alternatively, the gradient coating is darker in the middle of the curved material 12 and lighter about the periphery of the curved material. In yet another embodiment, the gradient coating is provided in addition to the glossy coating. For example, the gradient coating and the glossy coating both may be applied to the outer surface of the curved material 12. Alternatively, the glossy coating is applied to the outer surface of the curved material 12 and the gradient coating is applied to the inner surface of the curved material.
In another embodiment, a diffusion screen (not shown) is provided in front of or behind the curved display 12. Alternatively, the diffusion screen is coupled directly to the front and/or the back surface of the curved display 12. The diffusion screen may be made from a thin, semi-flexible acrylic optical beads. In one embodiment, a rigid metal frame encapsulates the diffusion screen to help achieve a uniform and repeatable manufacturing of the screen.
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The DLP device 18 may directly project video images onto the inner surface of the curved material 12 as shown in
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In some embodiments, the edges of the projected image are bowed/distorted, thereby creating a fish-eye effect. This effect may be corrected using warping software and/or hardware to correct the projected image. In another embodiment, a warping template, which is previously created for a particular hardware configuration, may be applied to correct the projected image.
In alternate embodiments, a combination of a short-throw lens 60 and a back-coated mirror may be used to achieve the proper throw distance for the DLP device 18. In another embodiment, a combination of a short throw-lens and two or more mirrors may be used to achieve the proper throw distance. In other embodiments, two or more mirrors may be used to provide the appropriate light path length while reducing the overall depth of the enclosure. In yet another embodiment, the gaming cabinet (not shown) is sized to allow the DLP device 18 to directly project an image onto the curved display 12 without needing a short-throw lens and/or any mirrors.
Additionally, the transducers 66 are able to adhere to the skin of the glass-like materials of the touch panel 54 sufficiently to pass around curves. This allows a curved touch panel (not shown) to be utilized without detrimental effects. Accordingly, in one embodiment, the touch panel 54 has a radius of curvature similar to the curved display 12. Also, one of ordinary skill in the art will appreciate that while the touch panel 54 is shown to be rectangular in shape with respect to
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In one embodiment, the microprocessor 72 runs an application that translates the touch panel controller 70 serial touch information into reel control commands for the GDCU reel controller 74. The application uses drivers to communicate with the GDCU 74 which controls the projection of the image onto the curved display 12. The GDCU 74 is a communications portion of the gaming machine 10 which “talks” to the different components of the gaming machine.
As shown in
The touch panel system 64 is adapted to detect and interpret different types of touch data. For example,
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In various embodiments, the ability to swap symbols may be a feature of the game or the player must have satisfied some predefined criteria to permit this feature of the game. For example, the predefined criteria may be one or more maximum wagers, a predefined period of continuous play, a particular player club level, accrual of a particular number of player club points, or any other trigger events known or developed in the art. As those skilled in the art will appreciate, the game may be limited to only allow the player to swap certain game indicia. Alternatively, the game may allow any swapping of game indicia between reels or on the same reel. Optionally, the game may allow more than one swap per game.
In yet another embodiment, the touch screen is configured to accept touch data that allows a player to add a game indicia onto one or more reels or remove one or more indicia from a reel as shown in
In another embodiment, the touch screen is configured to accept touch data that allows a player to define a pay line. Accordingly, a player may drag a finger across the screen to connect a number of positions on one or more reels to form a pay line. For example, in a three-reel game having three pay lines (i.e., display shows three symbols on each reel), the player may define a pay line that is composed of two symbol positions on the first reel and one symbol position on the second reel. These symbol positions are generally composed of three adjacent symbol positions. Alternatively, the pay line is composed of three non-adjacent symbol positions. In another embodiment, the pay line may be composed of merely three symbol positions on any number of the reels. As those skilled in the art will appreciate, a five-reel game having a touch screen may allow a player-defined pay lines.
The LCD 100 may present gaming and non-gaming related information. The gaming information may include, but is not limited to, available credits, credits wagered, credits wagered per pay line, active pay lines, win meter, wager denomination, indicia representing selected pay lines, maximum bet amount, amount wagered, or any combination thereof. Other gaming information includes, but is not limited to, game instructions one or more help menus, one or more pay tables, jackpot or progressive jackpot or game information, tournament game information, community gaming information, notification of a bonus game, number of bonus points, animation, images (e.g., still or video), or other features related to game play or the game theme.
In addition to gaming information, the LCD 100 may present non-gaming information during or prior to the game (e.g., during an attract mode). The LCD 100 may present either still images, video images, or graphics related to the game title or game theme. Optionally, the LCD 100 may present information not related to the game such as, but not limited to, player tracking account information, advertisements, a news ticker, sports ticker, safety information (e.g., warnings regarding responsible gaming, fire alarms, or the like), or status of a drink and/or food order.
In yet another embodiment, the LCD 100 may present a player interface having one or more images of buttons 102. The buttons 102 may be related to game play (e.g., spin reels or activate a bonus game) or wagering activities such as, but not limited to, selecting a wager denomination, selecting a wager amount, placing a maximum bet, placing a minimum bet, or cashing out remaining credits.
In another embodiment, the LCD 100 of
Optionally, an aperture (not shown) may also be positioned in front of the projection source (or within the lens of the projection source) to reduce any stray light from reflecting within the enclosure. The aperture may be flat material having one or more openings corresponding to the images being projected onto the curved display.
The self-contained projection system 200 is mounted within a gaming cabinet comprising 206 brackets 208 provided on the sides of the enclosure 202, as shown in
Because the self-contained projection system 200 is sealed, one or more fans or heat pumps are provided to remove heat from the enclosure 202. For example, a fan 210 is provided at the top of the enclosure 202, and a fan 212 is provided near the DLP projector as shown in
In
As shown in
The lower mirror 214 is angled such that the bottom of the mirror is further away from the front of the enclosure 202 as compared to the top of the mirror. Similarly, the upper mirror 216 is angled so that the bottom of the mirror is closer to the front of the enclosure as compared to the top of the mirror. That is, the lower and upper mirrors 214, 216 are angled to reflect the projected image upwards and ultimately to the curved material 12. The mirrors 214, 216 reduce the overall depth of the enclosure 202 by dividing the light path. In other embodiments, the mirrors may be angled in any direction or at any angle to ensure that the projected image is reflected onto the curved material.
In one embodiment, the mirrors 214, 216 are attached to a hinge (not shown) in order to adjust the angle of the mirrors. In another embodiment, a remotely controlled motor (not shown) is coupled to the mirrors 214, 216 by a force transmission member (not shown) in order to adjusts the angle of the mirrors 214, 216. In yet another embodiment, one or more shims are used to adjust and fix the position of the mirrors. In another embodiment, the lower mirror 214 is adjustable and the upper mirror 216 is mounted at a fixed angle. Alternatively, the lower mirror 214 is fixed and the upper mirror 216 is adjustable. Optionally, the angle of the mirrors 214, 216 may also be adjusted by a laser alignment process. A laser is used during the assembly process to ensure that the optical path is properly aligned and calibrated.
The gaming machines 10 are connected via a network to a network bridge 150, which is used for networking, routing and polling gaming machines, including slot machines. The network bridge 150 connects to a back end system 142. Optionally, the gaming machines 10 may connect to the network via a network rack 142, which provides for a few numbers of connections to the back end system 142. Both, network bridge 150 and network rack 154 may be classified as middleware, and facilitate communications between the back end system 142 and the game management units 152. The network bridges 150 and network rack 154 may comprise data repositories for storing network performance data. Such performance data may be based on network traffic and other network related information. Optionally, the network bridge 150 and the network rack 154 may be interchangeable components. For example, in one embodiment, a casino gaming system may comprise only network bridges and no network racks. Alternatively, in another embodiment, a casino gaming system may comprise only network racks and no network bridges. Additionally, in an alternative embodiment, a casino gaming system may comprise any combination of one or more network bridges and one or more network racks.
The back end system 142 may be configured to comprise one or more servers. The type of server employed is generally determined by the platform and software requirements of the gaming system. In one embodiment, as illustrated in
Overall, the back end system 142 performs several functions. For example, the back end system 142 can collect data from the slot floor as communicated to it from other network components, and maintain the collected data in its database. The back end system 142 may use slot floor data to generate a report used in casino operation functions. Examples of such reports include, but are not limited to, accounting reports, security reports, and usage reports. The back end system 142 may also pass data to another server for other functions. Alternatively, the back end system 142 may pass data stored on its database to floor hardware for interaction with a game or game player. For example, data such as a game player's name or the amount of a ticket being redeemed at a game may be passed to the floor hardware. Additionally, the back end system 142 may comprise one or more data repositories for storing data. Examples of types of data stored in the system server data repositories include, but are not limited to, information relating to individual player play data, individual game accounting data, gaming machine accounting data, cashable ticket data, sound data, and optimal display configurations for one or more displays for one or more system game.
Of course, one will appreciate that a gaming system 140 may also comprise other types of components, and the above illustrations are meant only as examples and not as limitations to the types of components or games used in a casino gaming system.
Referring back to
In another embodiment, the player-activated button is a universal button module that provides a dynamic button system adaptable for use with various games, as disclosed in U.S. application Ser. No. 11/106,212, entitled “Universal Button Module”, filed Apr. 14, 2005 and U.S. application Ser. No. 11/223,364, entitled “Universal Button Module”, filed Sep. 9, 2005, which are both hereby incorporated herein by reference. In other embodiments, other input devices, such as but not limited to, touch pad, track ball, mouse, switches, and toggle switches, are included with the gaming machine to also accept player input.
In yet another embodiment, a cellular phone or other input device (e.g., PDA), separate and apart, from the gaming machine 10 may also be used to input various player choices and information to enhance the player's interactive experience with the gaming machine. In this embodiment, the gaming machine 10 includes an IR sensor, RF sensor, BLUETOOTH receiver, or other means for receiving input from a cellular phone or other wireless input devices. Furthermore, inputting information via these devices provides an added level of security as any key presses may be hidden from view. In yet another embodiment, a player may call or send a text message or a short message service (SMS) to the gaming machine 10.
The main cabinet 14 of the gaming machine 10 is a self-standing unit that is generally rectangular in shape. In another embodiment, the main cabinet is a slant-top gaming cabinet. Alternatively, in other embodiments, the gaming cabinet may be any shaped cabinet known or developed in the art that may include a top box. Additionally, the cabinet may be manufactured with reinforced steel or other rigid materials that are resistant to tampering and vandalism. Optionally, in an alternate embodiment, the gaming machine is a cinema-style gaming machine (not shown) having a widescreen display, as disclosed in U.S. application Ser. No. 11/225,827, entitled “Ergonomic Gaming Cabinet,” filed on Sep. 12, 2005, which is hereby incorporated herein by reference.
As shown in
In another embodiment, the top box 18 includes a secondary display 24. The secondary display 24 presents game information (e.g., name of the game, animation, one or more pay tables, game information, one or more help menus, progressive jackpot or game information, tournament game information, or any combination thereof) or non-game related information (e.g., news, advertisements, messages, promotions, or any combination thereof). In another embodiment, the secondary display 24 presents a secondary game such as, but not limited to, a bonus game, a progressive game, or another game of chance such as, but not limited to, video slots, video keno, video poker, video blackjack, video roulette, Class II bingo, games of skill, games of chance involving some player skill, or any combination thereof.
In an alternative embodiment, the secondary display 24 presents game-related information such as, but not limited to, a pay table or one or more game options to the player. Alternately, the secondary display 24 presents non-game related information such as, but not limited to, advertisements, news, information on sports betting and betting options for those sporting events, requests for drinks or food, concierge services, or promotional information (e.g., information relating to player's club).
Optionally, the gaming machine 10 also includes a third display 30 positioned above the curved material 12. As those skilled in the art will appreciate, the third display may be positioned below the main display, adjacent to the primary or secondary display, on the player interface, or any location on the gaming machine within the line-of-sight of a player. According to one embodiment, the third display 30 is a graphical interface, which is the subject of U.S. patent application Ser. No. 10/943,771, filed Sep. 16, 2004, which is hereby incorporated herein by reference.
The graphical interface includes a web content capable display screen and an embedded processor. Preferably, the web content capable display screen presents web information to a user via the display screen. The embedded processor preferably utilizes an internal operating system and communicates with the gaming processor of the gaming machine. Preferably, the embedded processor reads incoming data, translates the data into a web protocol (web authoring language), if necessary, and maps the data to the web content capable display screen. In this manner, the web content capable display screen increases user excitement by providing a richer gaming experience. Furthermore, the display allows the player to play a secondary game, input information, make selections, receive promotional information or other types of information including, but not limited to, notification that the player has won a system award, is entered into a tournament game or other bonus game. Additionally, the player is able to configure the attributes of interchanging display content via the graphical interface. In another embodiment, the content of the graphical interface may be presented on a portion of the main display 12 or as a pop-up window on the main display.
As shown in
Typically, the player tracking system is operatively connected to one or more input components on the gaming machine 10. These input components include, but are not limited to, a slot 26 for receiving a player tracking card, a keypad or equivalent, an electronic button receptor, a display, a touch screen, or the like. The player tracking system may also include a database of all qualified players (i.e., those players who have enrolled in a player rating or point accruing program). Generally, the database for the player tracking system is separate from the gaming machines.
The main cabinet 14 of the gaming machine also houses a game management unit (not shown) that includes a CPU, circuitry, and software for receiving signals from the player-activated buttons 20, operating the games, and transmitting signals to the respective game display 12, 24 and speakers.
In various embodiments, game program may be stored in a memory (not shown) comprising a read only memory (ROM), volatile or non-volatile random access memory (RAM), a hard drive or flash memory device or any of several alternative types of single or multiple memory devices or structures. Optionally, the gaming machines 10 includes one or more data repositories for storing data. Examples of information stored by the gaming machines 10 include, but are not limited to, accounting data, maintenance history information, short and/or long-term play data, real-time play data, sound data, video data, or animation data.
As shown in
In another embodiment, the gaming machine 10 includes an internet connection or other known network connections to link one or more gaming machines together. According to one embodiment, the internet connection is used for web browsing, prize redemption, or access to other gaming or non-gaming information. Additionally, with the various gaming machines in communication with one another (or a system host), the gaming machine 10 may participate in a gaming tournament. In one embodiment, the gaming tournament is a competitive gaming tournament having one or more winners. Alternatively, the gaming tournament is a cooperative gaming tournament where all eligible gaming machines win a particular award.
One of ordinary skill in the art will appreciate that not all gaming machines have all these components and may have other components in addition to, or in lieu of, those components mentioned here. Furthermore, while these components are viewed and described separately, various components may be integrated into a single unit in some embodiments.
The various embodiments and methods described above are provided by way of illustration only and should not be construed to limit the claimed invention. Those skilled in the art will readily recognize various modifications and changes that may be made to the claimed invention without following the example embodiments and applications illustrated and described herein, and without departing from the true spirit and scope of the claimed invention, which is set forth in the following claims.
This application is a continuation-in-part of U.S. patent application Nos. 12/271,781 and 12/271,802 both of which were filed Nov. 14, 2008, both which are continuation-in-parts of U.S. patent application Ser. No. 11/209,895 filed Aug. 23, 2005, which is a divisional of U.S. patent application Ser. No. 09/690,289, now U.S. Pat. No. 6,942,571, all of which are hereby incorporated by reference. This application is also related to co-pending U.S. patent application Ser. No. ______ concurrently filed on May 11, 2009, entitled GAMING MACHINE HAVING A CURVED DISPLAY WITH A VIDEO SWITCHER AND TOUCH SCREEN SYSTEM, which is hereby incorporated by reference.
Number | Date | Country | |
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Parent | 09690289 | Oct 2000 | US |
Child | 11209895 | US |
Number | Date | Country | |
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Parent | 12271781 | Nov 2008 | US |
Child | 12463940 | US | |
Parent | 12271802 | Nov 2008 | US |
Child | 12271781 | US | |
Parent | 11209895 | Aug 2005 | US |
Child | 12271802 | US |