Patent Application
20150298015
The present invention generally relates to devices that are adapted to propel themselves through a medium.
Toys are designed to provide entertainment, and sometimes an educational experience, and are undoubtedly enjoyed by many. One class of toys of particular interest encompasses aquatic toys configured to propel themselves through water (e.g. in a bath tub or a pool). For example, many young adults enjoy miniaturized, to-scale, radio-controlled boat toys that generally emulate the operation of actual boats. Notably, these aquatic toys can be particularly useful in that they can allow their users to develop a more intimate understanding of water and its unique properties. For instance, aquatic toys that propel themselves through water allow their users to develop a greater intuition for hydrodynamics. Indeed, as can be appreciated, toys that propel themselves through any fluid (e.g. air) allow their users to develop a greater intuition about the respective fluid, and at the same time allow their users to enjoy the inherent entertainment value that the toys can provide. Accordingly, the current state of the art can benefit from such devices that can more affordably and/or more advantageously propel themselves through a medium.
Systems and methods in accordance with embodiments of the invention implement devices adapted to propel themselves through a medium, where the path that they traverse can be advantageously controlled. In one embodiment, a device adapted to propel itself through a medium includes: a body; a drive mechanism coupled to the body; a propeller rotatably coupled to the drive mechanism; a first wing coupled to the body, the first wing being configured to generate a first lift; and a second wing coupled to the body, the second wing being configured to generate a second lift that is different than the first lift.
In another embodiment, the device further includes a vertical member coupled to the body.
In yet another embodiment, the body is an elongated body having a forward end, an aft end, and a characteristic width; and the diameter of the propeller is larger than the characteristic width of the elongated body.
In still another embodiment, the propeller is disposed proximate the aft end of the elongated body; and the vertical member is disposed proximate the aft end of the elongated body.
In still yet another embodiment, the elongated body defines a first side, and a second, opposing, side; and the first wing is coupled to the first side of the elongated body, and the second wing is coupled to the second side of the elongated body.
In a further embodiment, the first wing defines a positive angle of attack with respect to the forward end of the elongated body; and the second wing does not define a positive angle of attack with respect to the forward end of the elongated body.
In a still further embodiment, the second wing defines a negative angle of attack with respect to the forward end of the elongated body.
In a yet further embodiment, the elongated body includes a cavity portion.
In a still yet further embodiment, the cavity portion is cylindrical and has a diameter sized to accommodate a coin.
In another embodiment, the cavity has a diameter sized to accommodate a United States penny.
In still another embodiment, the drive mechanism includes an elastic member.
In yet another embodiment, the elastic member is elastic in torsion.
In still yet another embodiment, the drive mechanism is removably coupled to the elongated body.
In a further embodiment, the elongated body includes a plurality of coupling mechanisms, each of which allows the drive mechanism to removably couple with the elongated body.
In a still further embodiment, a method of assembling a device adapted to propel itself through a medium includes: inserting a first wing into a slot defined by a first body structure; inserting a second wing into a slot defined by a second body structure; where each of the first wing and second wing includes a wide portion; where the wide portion of the first wing is wider than the slot defined by the first body structure; where the wide portion of the second wing is wider than the slot defined by the second body structure; where at least one of the first wing and second wing includes an inset portion; arranging the first body structure and the second body structure such that at least some portion of the slots overlap and such that the wide portion of the first wing abuts the second body structure and the wide portion of the second wing abuts the first body structure; and affixing the arrangement whereby at least some portion of the slots overlap and the wide portion of the first wing abuts the second body structure and the wide portion of the second wing abuts the first body structure.
In a yet further embodiment, arranging the first body structure and the second body structure further includes arranging a third body structure between the first body structure and the second body structure, the third body structure defining a slot configured to house the wide portion of the first wing and the wide portion of the second wing.
In a still yet further embodiment, affixing the arrangement includes using at least one ratcheting action rivet to affix the arrangement.
In another embodiment, each of the first body structure, the second body structure, the third body structure, the first wing, and the second wing is planar.
In still another embodiment, the slot defined by the first body structure defines a positive angle of attack in the assembled device, and the slot defined by the second body structure defines a negative angle of attack in the assembled device.
In yet another embodiment, each of the first body structure, the second body structure, and the third body structure defines at least one cavity portion.
In still yet another embodiment, a kit for a device adapted to propel itself through a medium includes: a first body structure, defining at least one cavity portion and at least one slot; a second body structure, defining at least one cavity portion and at least one slot; a third body structure defining at least one cavity portion and at least one slot; a first wing defining a wide portion and an inset portion; a second wing defining a wide portion; a first panel for accessing the cavity portion; a second panel for accessing the cavity portion; a horizontal stabilizer; an elastic member; and a propeller.
Turning now to the drawings, systems and methods for implementing devices adapted to advantageously propel themselves through a medium are illustrated. In one embodiment, a device adapted to propel itself through a medium includes a body, a propeller, and two wings, the two wings being configured to counteract rotational forces that may be imparted on the body by the propeller. In many embodiments, each of the two wings is configured to generate a different lift, and the two wings are thereby configured to counteract rotational forces that may be imparted on the body by the propeller. In numerous embodiments, a first wing defines a positive angle of attack, and a second wing defines a negative angle of attack, and the two wings are thereby configured to counteract rotational forces that may be imparted on the body by the propeller. In a number of embodiments, the body is elongated. In a plurality of embodiments, the propeller is driven by an elastic member that is elastic in torsion. In several embodiments, the body includes an accessible cavity portion that can accommodate the removable attachment of weights.
While a number of aquatic toys designed to propel themselves through water exist, many of them are burdened with any of a variety of shortcomings. For example, one type of aquatic toy is based on the emulation of a miniaturized—generally to-scale —submarine structure. In many instances, such miniaturized submarine structures are designed to propel themselves through water using a propeller, and frequently, the propellers are powered by the winding of the propeller—e.g. the propeller may be coupled to an elastic member that is elastic in torsion, such as a rubber band, such that the winding of the propeller stores energy in the band that is used to actuate the propeller. However, because these submarine toys endeavor to embody a generally to-scale submarine structure, the propellers are proportionally miniaturized in relation to the body of the submarine structure to an extent that they are difficult to handle and otherwise manipulate by their users (e.g. they may be difficult to wind); as a result, playing with such toys can be a frustrating experience, especially for impatient youths. Moreover, because of their relatively small surface area, the smaller propellers do not experience much water-resistance as they are propelling the toy through water—consequently, where the propellers are driven by stored elastic energy, the stored elastic energy may release relatively quickly as it drives the propeller, which in turn can result in a relatively high-speed propulsion, but for only a relatively short amount of time.
Another class of aquatic toys implements fish-like structures that are designed to propel themselves through water with the ‘wagging’ of a tail structure. However, such propulsion mechanisms are generally inefficient and may not be as versatile as a propeller.
The devices disclosed in the instant application overcome these shortcomings by implementing structures that incorporate propellers large enough to easily handle and manipulate, even for a child. Importantly, the rotation of such propellers can impart rotational forces on the propelled body that may result in its undesired rotation as it is being propelled. Thus, the propelled body can incorporate structures configured to counteract rotational forces that may be applied onto the propelled body by the propeller. In this way, devices that propel themselves through a medium using a propeller that is generally easy to handle and manipulate can be implemented, where the undesired rotation of the propelled body due to forces exerted by the propeller can be avoided. Additionally, the device can be configured such that the propeller can be easily reoriented relative to the body such that the trajectory of the device as it propels itself through a medium can be controlled. The structure of these devices, and their operation is now discussed in greater detail below.
Devices Adapted to Advantageously Propel through a Medium
In many embodiments of the invention, devices that are adapted to advantageously propel themselves through a medium are implemented. In numerous embodiments, the device include a body, a drive mechanism coupled to the body, a propeller rotatably coupled to the drive mechanism, and at least one structure configured to counteract rotational forces imparted on the body by the propeller. In numerous embodiments, the propelled body includes a pair of wings, each of which being configured to generate a different lift so as to counteract rotational forces that may be imparted on the propelled body by the propeller.
A discussion of one of the principle modes of operation of the device facilitates an understanding of the utility of its configuration—
While
While
The body can be made of any suitable material in accordance with embodiments of the invention. For example, in many embodiments, the body is made from water-resistant Italian Poplar—its water-resistance and overall buoyancy can make it an effective material from which to form the body of a device that is adapted to operate in water. In a number of embodiments, the body is made from Baltic Birch plywood. Where plywood is used, it is preferable that any constituent glue that is incorporated in the plywood is water-resistant if the device is intended to operate in water. Where the device is intended to operate in water, it may be preferable that a buoyant material is used. Although, it should be clear that any suitable material may be used. In some embodiments, where the device is intended to operate in water, the body is made from a non-buoyant material but the body includes cavities that reduce its overall mass. In this way, the body can be configured such that it is buoyant in spite of the fact that it includes non-buoyant materials. In a number of embodiments, aspects of the device that are intended to be entirely submerged in, e.g. water, are made from non buoyant materials. For example, the propeller fins and/or wings of the device can be made from non-buoyant materials (e.g. clear plastic material). Although aspects of the device are made from non-buoyant materials, the device overall may nonetheless be buoyant—e.g. the remainder of the device may be constructed from buoyant materials, or alternatively, cavities may be incorporated into the device to provide buoyancy. In some embodiments, a more dense material is used where it is desired that the device operate at a specified lower depth under water. Indeed, the material can be chosen based on the desired operation depth in accordance with embodiments of the invention.
In a number of embodiments, the body includes at least one cavity portion, sized for the insertion of weights. Accordingly, weights may be inserted into the device to thereby control the depth at which the device propels itself through a medium (e.g. the depth at which the device propels through water). For example, more weight may be added to cause the device to operate at a lower depth, while fewer weights (or no weights) can be added to cause the device to operate at a relatively higher depth. Moreover, weights that are added can serve as ballast that stabilizes the orientation of the device. Notably, cavity portions may be disposed proximate the center of mass of the device such that weights that are inserted into the cavity portion do not act to apply a downward force that disorients the device. In some embodiments, cavity portions are included forward and/or aft of the center of gravity—in this way, weights may be added to the respective forward or aft cavities to control the orientation (e.g. angled downward or upward) of the device as it propels itself through a medium. In numerous embodiments, the cavity within the body is sized for the insertion of a common trinket. For example, in many embodiments, the body includes a cavity portion sized for the insertion of U.S. pennies, which are commonly available; in this way, users can more readily configure the operation depth of the device. In a number of embodiments, the cavities are accessible by the medium when the device is exposed to the medium. Thus, for example, where a device is adapted to propel itself through water, the included cavities are accessible by the water when the device is placed in water so that the cavities do not undesirably trap air, which may have the effect of altering the buoyancy properties of the device and thereby undesirably disorienting it.
In many embodiments, the devices are adapted to propel themselves through water, and include ballast chambers that are configured to fill with water when the device is immersed in water. The water-filled-ballast chambers thereby reduce the buoyancy of the device while it is being operated. The reduction in buoyance can, for example, prevent the device from undesirably entirely emerging from the water and floating on the surface. Of course, it should be clear that in many instances, when in proper operation, part of the device will be submerged in water, and part of the device will be above the water level. In many instances, the ballast chambers are strategically located so as to control the orientation of the device as it is submerged in water. It should also be understood that in many instances, the devices include both cavities sized for the insertion of weights and ballast chambers—these aspects can allow the operating depth and the overall buoyancy of the device to be determined.
As referenced previously, structures can be incorporated onto the body that provide a counter-rotating force in accordance with embodiments of the invention. For example, as can be appreciated from the above discussion, a pair of wing structures, each providing a different lift can be incorporated. For example, in some embodiments, a first wing has a positive angle of attack (e.g. relative to a forward direction) so as to generate an upward lift, while a second wing is configured to have a negative angle of attack to generate a downward lift to thereby counteract any undesired rotation of the body. The wings can be disposed on opposing sides of the body so that they can provide a counter-rotational force in accordance with embodiments of the invention. As alluded to previously, they do not have to be lengthy to achieve the stabilizing effect; that they are each configured to provide a different lift may be suitable in and of itself to achieve the desired effect. In some embodiments, the length of each wing is less than approximately one-third of the length of the body. In numerous embodiments, the length of each wing is less than one-fourth of the length of the body. Of course, the wings can be configured in any suitable way to provide a counter-rotational force in accordance with embodiments of the invention. For example, in some embodiments, a first wing and a second wing have the same polarity in terms of angle of attack, but are configured to generate different magnitudes of lift. Accordingly, the first wing and second wing can thereby counteract a rotational force imposed by the propeller on the body. In some embodiments, one wing has a neutral angle of attack, while another wing has either a positive or negative angle of attack. The wing having the positive or negative angle of attack can thereby generate a lift that opposes the rotational force on the body caused by the propeller. In a few embodiments only a single wing is used to generate a single lift that counteracts rotational forces on the body that may be caused by the propeller. In some embodiments, a pair of wings is disposed on a single side of the body, and is used to generate the lift that counteracts rotational forces on the body that may be caused by the propeller. In a number of embodiments, an asymmetric distribution of wings is adjoined to the body to generate the counteracting rotational forces. In many embodiments, the device includes four wings to generate counteracting rotational forces —two of which disposed at the forward end of the device and two of which disposed at the aft end of the device. In this arrangement, the two pairs of wings can balance the device. In a number of embodiments, the wings are in a biplane arrangement. While several wing arrangements are discussed that may be implemented to counteract rotational forces that may be imparted by the propeller on the body, any suitable structure that is configured to counteract those rotational forces may be implemented in accordance with embodiments of the invention, and they may be implemented in any suitable configuration.
Additionally, it should be noted that, where wings are incorporated, the wings can adopt any suitable configuration. For example, incorporated wings can be swept, forward swept, or straight. Additionally, the wings can be delta wings. Generally, any suitable wing configuration can be implemented in accordance with embodiments of the invention.
The propeller can be driven by any suitable drive mechanism in accordance with embodiments of the invention. For example, in many embodiments, the drive mechanism includes an elastic member that is elastic in torsion. Thus, the elastic member can be ‘wound up’ to store energy in its elasticity; the stored elastic energy can then be released to cause the rotation of the propeller. For example, where the device is configured to propel itself through water, the elastic member can be rotated in torsion so as to ‘wind it up’, the device can then be submerged in water, and the tension in the elastic member can then be released so as to apply a rotational force to the coupled propeller. Notably, when such devices include longer propellers, the length of the propeller can experience sufficient resistance from the water that slows the rotation of the propeller. In essence, the water can inhibit the immediate release of the elastic energy in the elastic member, and can instead cause the gradual sustained rotation of the propeller thereby enabling the device to be gracefully propelled through the water for a more extended period of time. In some embodiments, the elastic member can cause the gradual sustained propulsion of the device for longer than 10 minutes. Further, drive mechanisms based on elastic members may be further advantageous insofar as they may be waterproof, and thereby particularly suitable for devices configured to operate in water. As can be appreciated, where the drive mechanism couples to the body, it is preferable that the body be sufficiently rigid to be able to accommodate the drive mechanism without failing (e.g. without cracking). For example, where an elastic member defines the drive mechanism, and the elastic member couples to the body, the tension in the elastic member should not contort the body to an extent that the body cracks—at least when the propeller is not wound. As can be appreciated, the body should be sufficiently rigid to withstand the tension in the elastic member caused by the winding of the propeller to some reasonable extent such that the device can operate as desired. While a drive mechanism based on an elastic member has been discussed and illustrated, any suitable drive mechanism can be implemented. For example, drive mechanisms based on pneumatic devices may be implemented. In general, any drive mechanism that that can activate the rotation of a propeller can be implemented in accordance with embodiments of the invention.
In many embodiments, the body is configured such that the drive mechanism is removably coupled to it in any of a plurality of configurations, such that the location of the propeller that is coupled to the drive mechanism with respect to the body is controlled. In this way, the path that the device traverses as it propels itself through a medium can be controlled. For instance, in some embodiments, the body includes a plurality of attachment points such that the propeller can be located either centrally, towards the left side of the body, or towards the right side of the body. Thus, for example, the device will traverse a different path when the propeller is disposed towards the left side of the body than it would if the propeller was disposed centrally.
Notably, where the device includes a first wing and a second wing, each of which is configured to generate a different lift, the turning of the device as it propels itself through a medium can cause the device to change its depth. For example, when the device is turning, one of the wings will be moving at a faster speed than the other (e.g. when the device is turning left—the right wing will be moving at a faster speed), and the lift that the faster moving speed generates will be correspondingly higher
By contrast, when the same device 500 is configured to turn right, the upward lift generated by the first wing 508 is greater in magnitude than the downward lift generated by the second wing 510. Thus, the device tends upwards as it turns right such that the device essentially traverses an upward spiraling path.
In a number of embodiments, the body is flexible such that the drive mechanism can flex the body. For example, referring back to
In several embodiments, where the drive mechanism is centrally disposed, e.g. as seen in
In some embodiments where the propeller is slightly facing upward, the blades of the propeller may cause the device to yaw slightly to the left as it is propelled forward. For example, the device may be configured such that the counterclockwise rotation of the propeller (viewed from the aft end looking forward) causes the forward propulsion of the device. Accordingly, the upward swinging blade, disposed on the left side of the device, has a greater angle of attack as it moves through the medium, and this causes the device to slightly yaw to the left. As can be appreciated from the above discussion, where the device is turning left, the effect of a wing that is disposed on the right side may be pronounced, since it will be traveling at a relatively faster speed.
Although certain aspects for controlling the trajectory have been described, it should be clear that any of a variety of devices can be incorporated in accordance with embodiments of the invention. For example, in many embodiments, the device includes a vertical member disposed at the aft end of the body that can pivot left or right act and thereby act as a rudder to control the trajectory of the device. For instance, the vertical member may be pivoted left and thereby cause the device to turn left as it is propelled through a medium. In general, any of a variety of structures can be incorporated to help further control the trajectory in accordance with embodiments of the invention.
In a number of embodiments, the device includes a biasing member that biases the positioning of the propeller; the extent of the bias can vary during the propulsion of the device. For example, where the propeller is driven by an elastic member that is elastic in torsion and that uses stored strain energy to drive the propeller, the biasing member may be a function of the stored strain energy in the elastic member. For instance, where the elastic member is a rubber band, the propeller may be wound to store strain energy in the rubber band—doing so increases the tension that the rubber band exerts on the propeller, which makes it less susceptible to the influence of the biasing member that acts to reposition the propeller. However, as the stored strain energy is released to actuate the propeller, the tension in the rubber band may decrease and make the propeller more susceptible to the repositioning effect of the biasing member. The repositioning of the propeller consequently affects the trajectory of the device. For example, the biasing member can operate such that whereas the initial trajectory of the propelled device may be downward, as the tension in the elastic member that drives the propeller releases, the biasing member can reposition the propeller such that the trajectory of the device becomes upward. Of course, it should be understood that the biasing member can alter the trajectory in any number of ways in accordance with embodiments of the invention. For example, the trajectory can be controlled such that the device initially bears right, and subsequently turns left. As can be appreciated, any number of biasing members can be incorporated in accordance with embodiments of the invention to control the trajectory of the device as it propels through a medium.
Similarly, in numerous embodiments, the device includes a biasing member that biases the positioning of structures configured to provide counter-rotational forces; similar to before, the extent of the bias can vary during the propulsion of the device. Accordingly, the direction of propulsion can vary over time. As can be appreciated, the operating principles for these configurations are similar to those described above. For example, in many embodiments, a device includes wings and is driven by an elastic member (e.g. a rubber band) in conjunction with a propeller. The wings include attachment points which accommodate the elastic member, such that when the elastic member is taut, the wings adopt a first position, but when the elastic member is relieved of strain energy, the wings are repositioned, which consequently alters the path of traversal. In many embodiments, a distinct biasing mechanism can influence the repositioning of the wings.
Accordingly, it is seen that the above-discussed devices can allow greater control over trajectory of the device as it propels through a medium. Notably, although the operation of the device has been discussed with respect to water, it should be clear that the device can be adapted to propel through any suitable medium. For example, in many embodiments, the device is adapted to propel through air. While the above discussion has regarded the structure of devices that are adapted to advantageously propel through a medium, in many embodiments, methods for assembling such devices are provided. These methods are now discussed in greater detail below.
Methods for Assembling Devices that are Adapted to Advantageously Propel Themselves through a Medium
While the above-described devices can be educational and entertaining, they may also be made to be assembled in a convenient fashion. Accordingly, in many embodiments, methods for conveniently assembling devices that are adapted to advantageously propel themselves through a medium are provided. In many embodiments, planar structures are assembled to construct devices that can advantageously propel themselves through a medium. In numerous embodiments, the devices can be assembled without the use of adhesive substances; the assembly can thereby be made safer for younger children. In some embodiments, a first body structure includes a first slot that accommodates the insertion of a first wing, and a second body structure includes a second slot that accommodates the insertion of a second wing. Each of the first body structure and second body structure includes an inner side and an opposing outer side—the outer side being the side from which the wing will protrude in the final assembled configuration. In some embodiments, the first body structure becomes the left side of the fully assembled device, whereas the second body structure becomes the right side of the fully assembled device. The structure of the respective wings can be such that their respective widest dimension is wider than the respective slots. Accordingly, where each wing is inserted into a respective slot from the inner side and through to the outer side, at least some nominal portion of it does not pass through and is retained on the inner side. Recall that the device is not necessarily symmetrical; thus, for example, each wing may be adapted to provide a different lift by having a different angle of attack. For example, the first slot may be angled upwards such that it causes the wing to have a positive angle of attack, while the second slot may be angled downwards such that it causes the wing to have a negative angle of attack. In essence, the nominal portions of the wing do not necessarily entirely coincide. Although, in many embodiments, at least some portion of the slots overlap. Accordingly, at least one of the nominal portions includes an inset region; the inset region on the nominal portion of one wing can allow the wing to interface with the nominal portion of the other wing such that each nominal portion abuts the opposing side. In other words, whereas the wide portions of the wings that do not pass through the slot would otherwise coincide and interfere with each other, the inset region allows the wings to accommodate one-another and abut the opposing body structure. The respective bodies and the wings may be fastened in this configuration.
As can be appreciated, the above-described process can be implemented and modified in any of a variety of ways in accordance with embodiments of the invention. For example, in many embodiments, a third body structure is used to provide structural rigidity.
While the assembly of a particular device in accordance with embodiments of the invention has been illustrated and discussed, it should be clear that the assembly techniques described herein can be implemented in any of a variety of ways in accordance with embodiments of the invention. For example, in many embodiments, a third body structure providing structural support is not incorporated. In a number of embodiments, fastening components other than ratcheting action rivets are used to adjoin the members. Additionally, it should be clear that the described techniques are applicable to wings that overlap in any of a variety of ways—it is not necessary that the wings be configured to overlap to define an X-shaped pattern. For example, in many embodiments, the tip portions of the wings overlap (e.g., as opposed to the middle portions of the wing overlapping, which would result in an X-shaped pattern). In general, the description with respect to
The devices described herein can be enjoyed in any of a variety of ways in accordance with embodiments of the invention. One such example is now discussed below.
As can be appreciated, the above described devices can be enjoyed in any of a variety of ways in accordance with embodiments of the invention. For instance, in many embodiments, the device is operated in water, and users can ‘fish’ for the device. Any sort of fishing apparatus can be used. In many embodiments, an elastic loop (e.g. a rubber band) is used to capture the propelled device. As can be appreciated, the diameter of the loop can be sized appropriately so that it can encompass at least some portion of the device. A weight can be coupled to the elastic loop to cause it to sink into the water; in many embodiments a key ring is coupled to the elastic loop and serves as the weight that causes the elastic loop to sink into the water. A fishing rod and reel (or equivalent, e.g. a toy fishing rod/reel) can further be used to control the loop, and position it at the desired depth (e.g. the depth at which the device is travelling). The loop can be lowered in to the water so as to intercept the propelled device; where the device has travelled into the loop, the loop can be raised (e.g. via the fishing rod/reel), and the device can thereby be ‘caught.’ In many embodiments, the loop is sufficiently pliable such that when it is raised (e.g. via a fishing rod/reel), the applied tension causes the loop to enclose. Thus for example, where the device has travelled within the loop and the loop is raised, the applied tension can cause the loop to enclose and thereby further secure the device as it is being ‘caught.’ In this way, a fishing game can be implemented with the above-described devices. Of course, it should be clear that the above-described devices can be implemented in any of a variety of ways in accordance with embodiments of the invention.
More generally, as can be inferred from the above discussion, the above-mentioned concepts can be implemented in a variety of arrangements in accordance with embodiments of the invention. Accordingly, although the present invention has been described in certain specific aspects, many additional modifications and variations would be apparent to those skilled in the art. It is therefore to be understood that the present invention may be practiced otherwise than specifically described. Thus, embodiments of the present invention should be considered in all respects as illustrative and not restrictive.
The current application claims priority to U.S. Provisional Application No. 61/980,473, filed Apr. 16, 2014, the disclosure of which is herein incorporated by reference.
| Number | Date | Country | |
|---|---|---|---|
| 61980473 | Apr 2014 | US |
