Pie pusher merchandising display device

Information

  • Patent Grant
  • 6830157
  • Patent Number
    6,830,157
  • Date Filed
    Wednesday, November 27, 2002
    21 years ago
  • Date Issued
    Tuesday, December 14, 2004
    19 years ago
Abstract
A merchandising display track device is adapted to merchandise pies so that pies can be dispensed one at a time with the oldest pie dispensed first. The preferred embodiment of the device comprises a base member having a front end portion, first and second upstanding sidewalls connected to the base member forming a U-shaped structure having a front end portion, a rail connected to the base member between the sidewalls, and a pusher mechanism adapted to ride on the rail and push the articles toward the front end portion of the tubular housing. The front end portion of the base member extends forward more than the front end portion of the U-shaped structure to hold an article for dispensing articles one at a time.
Description




TECHNICAL FIELD OF THE INVENTION




This invention relates to a display device useful in merchandising articles, and, more particularly, to a shelf device having a pusher member for pushing articles forward on the shelf.




BACKGROUND OF THE INVENTION




Articles for sale are more appealing when fresh articles are displayed in a neat and orderly manner. Merchandising display shelves are used to enhance appeal by promoting order. Some articles can be arranged neatly in stacks on the shelves, while other articles can be arranged in orderly rows. Unfortunately shoppers have a tendency to topple neat stacks and dishevel orderly rows thereby requiring an attendant to restore order to the articles which is not only time consuming but costly as well. Also, it often places the attendant in a shopper's path making shopping less efficient. It is desirable to have a merchandising device that helps maintain the articles in an attractive arrangement.




In refrigerator and freezer units in supermarkets and other stores, articles, such as packages of frozen food, such as pies and pie shells for example, are often stacked on wire shelves. It does not take very long for the articles to become disheveled as a shopper removes articles from the rear or as close to the rear as is reachable in an effort to obtain the coldest, freshest or most frozen article available. Articles at the rear of the shelf are difficult to reach, and almost impossible to reach without experiencing discomfort from the cold or damp clothing as a result of the effort. There are track devices for dividing a wide shelf into narrower channels which help keeps articles in orderly rows. Many of these are bulky and unsuitable for use with frozen vegetables, pies, pie shells and other food articles. Also, many shelf devices depend on gravity feed to advance articles forward for removal.




There are pusher devices that push articles on a shelf forward for easy removal, but many of these devices lack ventilation which is required to keep frozen articles frozen. In a refrigerator there must be adequate ventilation to keep fresh foods fresh and frozen foods frozen. Some devices only push the articles forward without addressing dividing the articles into rows. Pusher devices disclosed in U.S. Pat. Nos. 5,562,217 and 5,634,564 are specifically designed to push beverage bottles forward but are not specifically designed for fresh or frozen articles. Accordingly, it will be appreciated that it would be highly desirable to have a pusher device that pushes a row of fresh or frozen articles forward while providing ventilation to keep the articles fresh or frozen.




SUMMARY OF THE INVENTION




The present invention is directed to overcoming one or more of the problems set forth above. Briefly summarized, according to one aspect of the invention, a merchandising display shelf track device is adapted to receive articles for sliding movement therealong for dispensing the articles one at a time. The device comprises a base member having a front end portion, upstanding sidewalls connected to the base member forming a U-shaped structure with a front end portion, a rail connected to the base member between the sidewalls, and a pusher mechanism adapted to ride on the rail and push the articles toward the front end portion of the tubular housing.




Spacer panels attached to the base member adjacent the sidewalls provide a pathway for the circulation of air. The front end portion of the base member extends forward more than the front end portion of the U-shaped structure so that the sidewalls do not obscure the pie or other merchandise. An upturned portion of the front end portion facilitates displaying a lead article or a stack of lead articles and positions the top lead article for easy removal. As the bottom article is removed, the pusher mechanism pushes the next stack of articles forward. The upturned portion of the front end portion acts as a stopper panel to retain the articles in the device until removed by a consumer.




According to another aspect of the invention, a merchandising display shelf track device comprises front and rear members, a bottom rail connected to the front and rear members that extends longitudinally between the front and rear members, a first top rail connected to the front member and positioned at a higher elevation than the bottom rail with the first top rail extending longitudinally between the front and rear members, and a second top rail connected to the front member and positioned at a higher elevation than the bottom rail with the second top rail extending longitudinally between the front and rear members. The first and second rails are spaced from one another and the top and bottom rails form a cradle adapted to receive the articles.




This cradle is formed of wire or plastic to support articles such as pies or pie shells on edge in an upright position. A pusher mechanism connected to the bottom rail ensures that articles are pushed forward for easy dispensing. A front panel attaches to the front member to provide product identification.




A tube positioned about the top and bottom rails and fastened to the bottom rail extends longitudinally so that a portion of the top and bottom rails extend longitudinally inside the tube. The pusher mechanism is located inside the tube and fastened to the bottom rail.




According to yet another aspect of the invention, a merchandising display shelf track device adapted to receive articles for sliding movement therealong comprises a base, a bottom rail connected to the base extending longitudinally along the base, and a tubular housing connected to the base and positioned about the bottom rail so that a portion of the bottom rail extends longitudinally inside the tubular housing. A pusher mechanism connected to the bottom rail pushes article forward for dispensing. A front panel attached to the front member acts as a stopper to prevent articles from being pushed off the device.




The tubular housing easily accommodates circular articles such as pies and pie shells with the articles standing on edge. A pusher mechanism connected to the bottom rail pushes the articles forward for dispensing one at a time. A cover panel covers a coil spring that provides the force for pushing the articles forward. The cover panel shield fingers from the spring while restocking the articles on the shelf.




The door panel closes to keep articles, such as frozen pies or pie shells, frozen while allowing access to remove one article at a time. A square or rectangular tube accommodates boxes of pies or pie shells with the shells sitting on their bottoms rather than their edges which allows a full view of the front of the container. The door panel allows pies to sit flat and be removed one at a time by naturally lifting and pulling forward.




According to a further aspect of the invention, a merchandising display shelf track device adapted to receive articles for sliding movement therealong comprises an elongated tubular housing having an interior sidewall and a front end portion, a rail connected to the interior sidewall, and a pusher mechanism adapted to ride on the rail and push the articles toward the front end portion of the tubular housing. The tubular housing has four interior sidewalls and the rail is connected to any one of the sidewalls. A door panel is connected to the housing and is pivotable between open and closed positions. At the closed position the door panel covers the front end portion to block access to the interior of the housing so that cold air stays inside the housing. At the open position the door panel allows access to the interior through the front end portion so that articles can be removed. The door panel is preferably hingedly connected along its top to pivot vertically between the open and closed positions.




These and other aspects, objects, features and advantages of the present invention will be more clearly understood and appreciated from a review of the following detailed description of the preferred embodiments and appended claims, and by reference to the accompanying drawings











BRIEF DESCRIPTION OF THE DRAWINGS





FIG. 1

is a side perspective view of a preferred embodiment of a pie pusher merchandising display track device according to the present invention.





FIG. 2

is a front perspective view of the pie pusher of FIG.


1


.





FIG. 3

top rear perspective view of the pie pusher of FIG.


1


.





FIG. 4

is a perspective view of another preferred embodiment of a merchandising display track device according to the present invention.





FIG. 5

is an attachment for the front of the device of FIG.


4


.





FIG. 6

is a perspective view of a preferred embodiment of a merchandising display track device for pies according to the present invention.





FIG. 7

is a bottom perspective view of a pie pusher merchandising display track device, similar to

FIG. 4

, but illustrating another preferred embodiment according to the present invention.





FIG. 8

is a top perspective of the pie pusher of FIG.


7


.





FIG. 9

is a rear perspective view of the pie pusher of FIG.


7


.





FIG. 10

is top perspective view of another preferred embodiment of a pie pusher merchandising display track device according to the present invention.





FIG. 11

is bottom perspective view of the pie pusher of FIG.


10


.





FIG. 12

is a diagrammatic sectional view of the pie pusher of

FIG. 11

taken along the midsection of the device.





FIG. 13

is top perspective view of another preferred embodiment of a pie pusher merchandising display track device incorporating a wire frame and tube according to the present invention.





FIG. 14

is a perspective side view of another preferred embodiment of a pie pusher merchandising display track device according to the present invention.





FIG. 15

is a perspective front view of the pie pusher of FIG.


14


.





FIG. 16

is a front view of the pie pusher of FIG.


14


.





FIG. 17

is a rear view of the pie pusher of FIG.


14


.











DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS




Referring to

FIGS. 1-3

, a merchandising display shelf track device


10


is adapted to receive articles, such as pies


12


for example, for sliding movement therealong. Device


10


has a base member


14


preferably constructed of plastic. Base member


14


has a front end portion


16


and a stopper panel


18


upstanding from front end portion


16


of base member


14


. First and second upstanding sidewalls


20


,


22


are connected to base member


14


forming a U-shaped housing structure having a front end portion. The front end portion of base member


14


extends forward a distance greater than the front end portion of the U-shaped housing structure. By this construction, the sides of an article sitting on base member


14


are visible for easy product identification and increased visual appeal of the article.




A rail


24


is connected to base member


14


between the sidewalls


20


,


22


. Because rail


24


is attached to base member


14


, it lies above base member


14


creating a space for air flow between the bottom of the articles


12


and base member


14


. A pusher mechanism


26


is adapted to ride on rail


24


and push the articles toward the front end portion


16


of the pie pusher device


10


. Pusher mechanisms are well known in the art. A pusher mechanism and rail are more fully described in co-pending application Ser. No. 09/964,090, filed Sep. 26, 2001, the disclosure of which is incorporated herein by reference.




To keep the articles


12


from leaning to one side or the other, first and second spacer panels


28


,


30


are attached to base member


14


adjacent a respective one of the sidewalls


20


,


22


. Spacer panels


28


,


30


keep the articles


12


level while allowing for the free circulation of air. The panels


28


,


30


may each have a plurality of parallel ribs that create air passageways, or may have a number of slots or other openings for air to flow through. Each panel may be formed of a single piece of material, or may have a solid base topped with a rib-bearing cover member.




A pusher panel


32


is connected to the pusher mechanism


26


and, preferably, slidably moves along spacer panels


28


,


30


. Ideally, pusher panel


32


is the same size as the article


12


to provide maximum support without danger of damage to the article or its packaging. If, for example, the panel has too small a surface area, it could damage a fragile article such as a pie shell, even when the shell is packaged in a box for display. On the other hand, too large a surface area could needlessly waste precious refrigerator shelf space.




Pusher mechanism


26


includes a coil spring


34


that provides the motive force for pushing articles forward as it recoils. A cover panel


36


attached to the rear of pusher panel


32


covers coil spring


34


. With the coiled portion of coil spring


34


covered, a person stacking articles in the device would not expose fingers or clothing to the coiled portion of the spring.




Referring now

FIGS. 4-5

, a merchandising display shelf track device is preferably constructed of wire formed as a basket adapted to receive articles, such as pies. The device has U-shaped front and rear members


38


,


40


and at least one bottom rail, but preferably two bottom rails


42


,


44


connected to both front and rear members


38


,


40


. Bottom rails


42


,


44


extend longitudinally between the front and rear members


38


,


40


.




A first top rail


46


is connected to front member


38


and rear member


40


and is positioned at a higher elevation than bottom rail


42


. A first top rail


46


extends longitudinally between the front and rear members


38


,


40


. A second top rail


48


is connected to the front and rear members


38


,


40


and is positioned at a higher elevation than bottom rail


44


. The second top rail


48


extends longitudinally between the front and rear members


38


,


40


. The first and second top rails are spaced from one another a greater distance than the bottom rails are spaced from one another so that the top and bottom rails form a cradle to receive the articles.




A front panel


50


has one or more clips


52


on each end thereof for attaching panel


50


to the front member


38


. Front panel


50


preferably has a front surface suitable for attaching or imprinting product identification information. One or more pairs of secondary clips


54


may be used to hold a product label against the front panel


50


.




Referring to

FIG. 6

, a wire frame


56


, similar to the wire frame of

FIG. 4

, is covered or coated with plastic, rubber or other coating material to increase aesthetic appeal. Front and rear panels


58


,


60


may each be imprinted with product identification or may have product labeling affixed thereto.




Referring to

FIGS. 7-9

, a pie pusher


62


has a front member


64


, a rear member


66


, and bottom rails


68


,


70


connected to the front and rear members


64


,


66


and extending longitudinally between the front and rear members


64


,


66


. A first top rail


72


is connected to front member


64


and rear member


66


, and is positioned at a higher elevation than the bottom rails


68


,


70


. First top rail


72


extends longitudinally between the front and rear members


64


,


66


. A second top rail


74


is connected to front member


64


and rear member


66


, and is positioned at a higher elevation than the bottom rails


68


,


70


. Second top rail


74


also extends longitudinally between the front and rear members


64


,


66


. The first and second top rails are spaced from one another, and the first and second bottom rails are spaced from one another. The space between the top rails is greater than the space between the bottom rails so that the top and bottom rails form a cradle adapted to receive and hold pies, pie shells and other articles having a circular periphery to rest in the cradle.




A front panel


76


is attached to front member


64


, preferably by clips or the like. Secondary clips


78


on front panel


76


may be used to affix product identification, or product labeling may be applied directly to front panel


76


, preferably with an adhesive or the like.




A pusher mechanism


78


is coupled to the bottom rails


68


,


70


via a central rail


80


. Central rail


80


preferably has a length equal to or less than the length of bottom rails


68


,


70


. If central rail


80


is longer than the bottom rails, it exceeds the length of the frame and may not fit the refrigerator shelf for which the frame is constructed. If central rail


80


is too short, it is not long enough to accommodate the number of articles for which the frame is constructed. Central rail


80


is therefore preferably shorter than the bottom rails by not more than the thickness of one article.




Central rail


80


has a central body portion that is preferably narrower that the space between the bottom rails


68


,


70


, but it can have a central body portion that is equal in width to bottom rail spacing or even greater than the bottom rail spacing. The narrower width is preferred so that pusher mechanism


78


can be kept narrower than the bottom rail spacing to thereby maintain the benefit of the cradle structure. The narrow width allows central rail


80


to be kept low near the level of the bottom rails where bottom rails


68


,


70


and central rail


80


cooperate to effectively form a single rail so that the cradle structure is maintained.




Central rail


80


has a number of clips


82


attached to the central body. The clips


82


snap onto the bottom rails


68


,


70


to anchor the central rail. The pusher mechanism


78


with its coil spring


84


ride on central rail


80


. A pusher panel


84


is connected to the pusher mechanism


78


and, preferably, slidably moves along central rail


80


. Ideally, pusher panel


84


is the same size as the article to provide maximum support without danger of damage to the article or its packaging. If the panel has too small a surface area, damage could result to a fragile article such as a pie shell, even when the shell is packaged in a box for display. On the other hand, too large a surface area could needlessly waste precious refrigerator shelf space.




Referring to

FIGS. 10-12

, a merchandising display shelf track device is adapted to receive articles, especially circular pies, for sliding movement therealong. The device has a base


86


, a bottom rail


88


connected to base


86


and extending longitudinally along base


86


, and a tubular housing


90


connected to base


86


and positioned about bottom rail


88


so that a portion of bottom rail


88


extends longitudinally inside tubular housing


90


. By tubular is meant a hollow structure which is commonly cylindrical but may be of regular or irregular cross-section. A tube may be elongated; that is, its length is greater than its diameter or cross-sectional dimension. To accommodate circular pies and pie shells, as well as other circular articles, tubular housing


90


is cylindrical with a portion of the top at the front truncated or removed to expose more of the article dispensed. The truncated opening also facilitates loading the device from the front.




A pusher mechanism


92


is connected to bottom rail


88


and slides therealong to push the articles forward in the tube for dispensing one at a time. Pies and pie shells are typically sold frozen. Upright display freezers are typically loaded from the front. Because the device is loaded from the front, a protective cover over the coil spring of the pusher mechanism is not required. A protective cover could, however, be added where rear loading is anticipated.




A front or stopper panel


94


is upstanding from base member


86


to halt forward movement of the articles thereby acting as a stopper to prevent articles from being pushed off the device. Stopper panel


94


may be flush against the front end of tube


90


, but it is preferred that a space exist between stopper panel


94


and housing tube


90


to expose more of the article therein for aesthetic appeal and to make removing the article easier. Ideally, the spacing between panel


94


and housing tube


90


need not be greater than the thickness of one article.





FIG. 13

illustrates an embodiment of the invention similar to

FIGS. 10-12

but replaces the base


86


and stopper panel


94


with a wire frame. The frame has bottom rails


96


and end rails


98


upstanding from bottom rails


96


. A housing


100


is supported on the rails, preferably by clips integrally formed with the housing tube


100


. Alternatively, a rail


102


connected to housing tube


100


and extending therebeyond may have slots or openings for engaging the wire rails of the frame. A pusher mechanism rides on housing rail


102


to push articles forward.




Referring to

FIGS. 14-17

, a merchandising display shelf track device is adapted to receive articles, particularly boxed articles such as pies


104


, for sliding movement therealong. The device has an elongated tubular housing with top, bottom, left and right sidewalls


106


,


108


,


110


,


112


. Bottom sidewall


108


preferably has bottom extension


114


that acts as a stopper member to prevent articles from being pushed off the device.




A rail


116


is connected on the interior of the housing tube to one of the sidewalls. As illustrated, rail


116


is fastened to the top sidewall


106


. A pusher mechanism


118


rides on rail


116


and pushes the articles toward the front end portion of the tubular housing. A pusher panel


120


is attached to pusher mechanism


118


to push the articles. Ideally, pusher panel


120


is about the same size in width and height as the article displayed. Preferably, pusher panel


120


is pivotable or foldable so that it can be lifted up out of the way when loading the device from the rear. A cover plate


121


can be used to cover the coil spring of the pusher mechanism when rear loading is anticipated.




Referring to

FIGS. 14-15

, the articles are stacked one atop the other in columns in the device and lie in a row several columns deep. The bottom article of the frontmost column abuts bottom extension


114


which halts forward motion of the article. Articles are preferably removed from the frontmost column one at a time by removing the top article; however, when only two articles are available in the front column, the bottom article can be removed because the height of the bottom extension does not prevent removal. Removal of the bottom article requires lifting the article and simultaneously pulling the article forward. To prevent disheveling of the front column caused by trying to removed the bottom article, a door is employed.




The door has a panel


122


preferably connected to sidewalls


110


,


112


of the housing with pins or other fasteners that allow pivoting motion. Panel


122


is pivotable between a closed position at which the door panel covers the front end portion of the housing to block access to the interior of the housing and an open position at which the door panel allows access to the interior of the housing through the front end portion of the housing. The door panel is vertically pivotable between the open and closed positions so that it moves up and down rather than left and right. Vertical pivotal movement ensures that the door panel does not obstruct the front column of articles so that easy removal is possible.




A latching device keeps door panel


122


in the closed position. The latching device may consist of spring fingers that abut the outside surfaces of the sidewalls and grasp the sidewalls to keep the door closed. Or, the latching device could employ magnets to keep the door closed. Or, the latching device may have a finger with an opening or keyway that engages a key or protrusion on the sidewall to keep the door closed.




It can now be appreciated that a preferred embodiment of a merchandising display shelf track device is adapted to receive articles for sliding movement therealong. The device has a base, a bottom rail connected to the base extending longitudinally along the base, and a tubular housing connected to the base and positioned about the bottom rail so that a portion of the bottom rail extends longitudinally inside the tubular housing. A pusher mechanism connected to the bottom rail pushes article forward for dispensing. A front panel attached to the front member acts as a stopper to prevent articles from being pushed off the device.




The tubular housing easily accommodates circular articles such as pies and pie shells with the articles standing on edge. A pusher mechanism connected to the bottom rail pushes the articles forward for dispensing one at a time so that a consumer does cannot rummage through articles pies to find what is thought to be the freshest article. A cover panel covers a coil spring that provides the force for pushing the articles forward. The cover panel shield fingers from the spring while restocking the articles on the shelf. The tubular housing can be equipped with a door which not only closes to keep the articles cold, but prevent inadvertent rummaging through the articles.




While the invention has been described with particular reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements of the preferred embodiments without departing from invention. For example, the invention has been described with reference to tubular housings and hollow parallelepiped housings, but other numbers of housing sidewalls can be used to fit the particular article. Also, the pusher mechanism is not gravity dependent and may be attached to any of the sidewalls; however, all sidewalls have a slight advantage over the bottom sidewall which is more apt to collect debris.




As is evident from the foregoing description, certain aspects of the invention are not limited to the particular details of the examples illustrated, and it is therefore contemplated that other modifications and applications will occur to those skilled in the art. For example, because the devices are only slightly larger in width and height than the articles displayed, they are candidates for stacking one atop the other as well as side by side to conserve refrigerator space. It is accordingly intended that the claims shall cover all such modifications and applications as do not depart from the true spirit and scope of the invention.



Claims
  • 1. A merchandising display shelf track device adapted to receive articles for sliding movement therealong, comprising:a single base member having a front end portion; a stopper panel upstanding from said front end portion of said base member; first and second upstanding sidewall panels connected to said base member forming a U-shaped structure having a front end portion, said front end portion of said base member extending forward more than said front end portion of said U-shaped structure; a first spacer panel attached to said base member adjacent said first sidewall panel; a second spacer panel attached to said base member adjacent said second sidewall panel; a rail connected to said base member between said first and second sidewall panels and lying above said base member creating a space for air to flow between the bottoms of the articles and said base member; and a pusher mechanism adapted to ride on said rail and push the articles toward said front end portion of said U-shaped structure; a pusher panel connected to said pusher mechanism and slidably movable along said first and second spacer panels; and a cover panel for covering a coil spring of said pusher mechanism.
  • 2. A merchandising display shelf track device adapted to receive articles for sliding movement therealong, comprising:a front member; a rear member; a bottom rail connected to said front and rear members and extending longitudinally between said front and rear members; a first top rail connected to said front member and positioned at a higher elevation than said bottom rail, said first top rail extending longitudinally between said front and rear members; a second top rail connected to said front member and positioned at a higher elevation than said bottom rail, said second top rail extending longitudinally between said front and rear members, said first and second rails being spaced, said top and bottom rails forming a cradle adapted to receive the articles; a tube positioned about said top and bottom rails and extending longitudinally so that a portion of said top and bottom rails extend longitudinally inside said tube, said tube being fastened to said bottom rail; and a pusher mechanism inside said tube fastened to said bottom rail.
  • 3. A merchandising display shelf track device, as set forth in claim 2, including a front panel attached to said front member.
  • 4. A merchandising display shelf track device, as set forth in claim 2, including a cover panel covering a coil spring of said pusher mechanism.
  • 5. A single merchandising display shelf track device adapted to receive articles for sliding movement therealong, comprising:a single base member; a front panel attached to said base member; a bottom rail connected to said base member and extending longitudinally along said base member; a pusher mechanism connected to said bottom rail a tubular housing connected to said base member and positioned about said bottom rail so that a portion of said bottom rail extends longitudinally inside said tubular housing; and a cover panel covering a coil spring of said pusher mechanism.
  • 6. A merchandising display shelf track device adapted to receive articles for sliding movement therealong, comprising:an elongated tubular housing having an interior sidewall and a front end portion; a rail connected to said interior sidewall; a pusher mechanism adapted to ride on said rail and push the articles toward said front end portion of said tubular housing; and a door panel connected to said housing and pivotable between a closed position at which said door panel covers said front end portion to block access to said interior of said housing and an open position at which said door panel allows access to said interior through said front end portion, said door panel being vertically pivotable between the open and closed positions.
  • 7. A merchandising display shelf track device, as set forth in claim 6, wherein said tubular housing has four interior sidewalls and said rail is connected to one of said sidewalls.
  • 8. A merchandising display shelf track device, as set forth in claim 6, wherein said front end portion of said tubular housing has a bottom extension.
US Referenced Citations (34)
Number Name Date Kind
463256 Side Nov 1891 A
2824666 Hausladen Feb 1958 A
2954128 Murray Sep 1960 A
3110402 Mogulescu Nov 1963 A
3161295 Chesley Dec 1964 A
3224822 Kirby Dec 1965 A
3308961 Chesley Mar 1967 A
3342536 Cohen Sep 1967 A
3679096 Musser Jul 1972 A
4730741 Jackle, III et al. Mar 1988 A
4887737 Adenau Dec 1989 A
4901869 Hawkinson et al. Feb 1990 A
5131563 Yablans Jul 1992 A
5449076 Van Noord Sep 1995 A
5450969 Johnson et al. Sep 1995 A
5562217 Salveson et al. Oct 1996 A
5605237 Richardson et al. Feb 1997 A
5634564 Spamer et al. Jun 1997 A
5685664 Parham et al. Nov 1997 A
5964373 Hucknall Oct 1999 A
6015051 Battaglia Jan 2000 A
6082558 Battaglia Jul 2000 A
6129218 Henry et al. Oct 2000 A
6193337 Roeker et al. Feb 2001 B1
6378727 Dupuis et al. Apr 2002 B1
6409027 Chang et al. Jun 2002 B1
6464089 Rankin, VI Oct 2002 B1
6536609 Lake Mar 2003 B2
6655536 Jo et al. Dec 2003 B2
20010035383 Burke Nov 2001 A1
20020108916 Nickerson Aug 2002 A1
20030057167 Johnson et al. Mar 2003 A1
20030085187 Johnson et al. May 2003 A1
20040000528 Nagel Jan 2004 A1