British merchant Peter Durand invented the tin can in 1810.
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| Number | Title | Issue Date |
| 8100786 | Tennis-game scorekeeping system and method A system of 8 loops (300) of elastic material and a method for keeping score or determining the winner of a tie-break during a tennis game using the 8 loops is disclosed. Of the 8 loops, 4 are to be affixed to a left shaft and 4 are to be affixed to a right s... | 01/24/2012 |
| 7871343 | Tennis ball retriever A spring wire loop is affixed to a tennis racquet to enable a player to conveniently scoop a tennis ball off the playing surface and retrieve it. In one add-on embodiment, the loop can be affixed by mounts secured to the strings of an existing racquet; in another it... | 01/18/2011 |
| 7862455 | Stringing sandwich, an apparatus that lays strings on top of each other within a frame of a racquet An apparatus that lays strings on top of each other within a frame; the overlying of the strings, once the process is finish, will create the arrays of intersections between the vertical and horizontal strings that create the net in a racquet, such as a tennis racqu... | 01/04/2011 |
| 7435196 | Apparatus and method for tennis swing training A racket swing training apparatus providing a user-chosen static positioning of a tennis racket in the hand, at angles to the forearm, which are determinable and repeatable. The device further provides components to set the face angle of the racket engaged to the de... | 10/14/2008 |
| 7427245 | Electronic racquet score keeper and vibration damper A vibration damper for a racquet sport includes a score tallying device for keeping the score of t racquet sport such as tennis. The current score is maintained by an electronic circuit and displayed on an electronic display within the vibration damper. The vibratio... | 09/23/2008 |
| 7335120 | String tension identification device and method A racquet string tension identification device and method for mounting on a stringed racquet utilizing a color coding system to denote the original string tension range in tens of pounds and having nine indicia areas with the number of additional pounds of tension t... | 02/26/2008 |
| 7335118 | Shock absorbing and sound producing device for tennis racket A device mounted in a tennis racket includes a cylindrical cushioning member including an annular groove, a central chamber, an axial channel crossed the chamber, and two recesses at its both ends; and a rigid, doughnut-shaped, hollow sound producing member mounted ... | 02/26/2008 |
| 7326134 | Device to control a swinging implement and method of use What is disclosed is a device for assisting a person using a golf club, tennis racket or other swinging sports implement to maintain control of the implement during the swing. The device is a strap or other similar device that is to connect the implement and the use... | 02/05/2008 |
| 7326133 | Racket assembly that warns of a fatigued string condition A racket assembly having a racket head that is supported by a handle. A string is strung across the racket head forming a string face. The string used in the string face is statistically likely to fail after the string face has been impacted a precalculated number o... | 02/05/2008 |
| 7322894 | Apparatus and method for tennis swing training A racket grip training apparatus providing user chosen static positioning of a tennis racket in the hand at angles to the forearm that are determinable and repeatable. The device further provides components to set the face angle of the racket engaged to the device a... | 01/29/2008 |
| 7300366 | Racquet sport score keeper and vibration damper A vibration damper for a racquet sport includes a score tallying device for keeping the score of t racquet sport such as tennis. A rotating score indicator is provided with allowed score values for indicating the current score by rotation of the indicator by a user.... | 11/27/2007 |
| 7273057 | Tethered styling instrument and method of use A styling device manipulated by a user that includes a hand-held styling comb; a wrist band that is adapted for attachment about the wrist of the user; and a tether line having one end attached to the hand-held styling comb and the other opposite end attached to the... | 09/25/2007 |
| 7201681 | Device for aligning strings of a racquet A handheld device for realigning the strings of a sports racquet, wherein the device is sized to fit into a clothing pocket of the user. The device comprises a body portion from which one or more alternately shaped protrusions extend. The protrusions generally inclu... | 04/10/2007 |
| 7169068 | Racquet-string alignment pick A stringed-racquet pick including a handle body and a string-realignment member having a conical head with a circumferentially position ridge along the base forming a stop. Furthermore, the handle body tapers to an appropriately smaller cross sectional area on the h... | 01/30/2007 |
| 7160216 | Accessory for rackets An accessory for rackets having an adjustable belt (1a) or a fastener 1(b) for stable connection to a handle (M) of a racket (R) and contact means (2) having a shaped concave guide (3) for a user's hand (H), designed to iden... | 01/09/2007 |
| 7156748 | Golf training device and method The golf training device comprises an arm band for attachment on the lead arm, above the elbow, and a resilient cord securable at one end to the arm band and having means at the other end for selectively attaching the cord on a golf club below the grip. A general me... | 01/02/2007 |
| 7147581 | Tennis stroke training device A racquet stroke training device adapted to “fix” a user's forehand racquet stroke comprises, in one embodiment, a band adapted to be worn on a user's arm above the user's elbow, a glove adapted to be worn on a user's hand, and a tether having a first end attach... | 12/12/2006 |
| 7140986 | Tennis racquet equipped with a tennis ball retriever A highly specific type of hooked materials, when applied to the shoulder of a tennis racquet, have been found to tangentially hook onto the nap of a tennis ball and allow the ball to be lifted from the court. Hooked materials characterized as comprising a series of ... | 11/28/2006 |
| 7121983 | Hand exerciser A new and improved method and apparatus for exercising the hand is disclosed herein. A stretchable web, with an array of spaced apertures is molded over a rigid frame. The web has multiple portions, wherein each portion is made of a different material with different... | 10/17/2006 |
| 7112153 | Retrieval device A retrieval device is connected to a racquet and is structured to allow a user to pick a ball up off of the ground without having to bend down to do the same. The retrieval device includes an elongated retrieval member having a stationary section connected to the ra... | 09/26/2006 |
| 6962541 | Apparatus for a lacrosse stick head An apparatus used in playing the sport of lacrosse. The apparatus is located in a lacrosse player's stick head. During lacrosse play, a player may find it advantageous to use this invention to finely adjust the lengths and tensions of the thongs or netting material ... | 11/08/2005 |
| 6866597 | Racket string correction tool A tool for adjusting string on a racket is disclosed. The tool is comprised of a longitudinal body comparable in size to that of a pen, defined by a hilt with a distal section that narrows at the end, which is provided with a notch to push the string transversally a... | 03/15/2005 |
| 6827654 | Device for training a sequence of movements A device (10) for training a sequence of movements for ball hitting implements (18), especially golf clubs and baseball bats, permits monitoring the observance of the correct sequence of movements. The monitoring device acts upon the implement (18 | 12/07/2004 |
| 6719651 | Tennis ball retrieval device A gripping device (10) for attachment to the bottom (102) of a tennis racquet (100) to retrieve tennis balls (200) wherein, the gripping device (10) is fabricated from a used tennis ball (20) having at least its lower quadra... | 04/13/2004 |
| 6692387 | Racquet string alignment tool A tool for realigning or straightening the strings of a racquet. The tool has a generally rectangular tip which is precisely dimensioned to fit within the normal space between the strings of a racquet. To realign the racquet strings, the tip is placed int... | 02/17/2004 |
| 6652397 | Adhesive ball retrieval and guard system for sports equipment A piece of sports equipment for striking a ball or other sports object is covered along an exposed edge with one side of an adhesive mating hook and loop fastener. A smaller mating strip of adhesive mating hook and loop fastener is interconnected with the... | 11/25/2003 |
| 6583590 | String drawing device for a racquet A string drawing electrical device for a racquet has a casing, a string holder, an actuating device and a control unit. The string holder is rotatably attached to a panel of the casing. The actuating device is mounted in the casing and provides two functi... | 06/24/2003 |
| 6527655 | Counting racket A counting racket comprises a racket assembly defined by a handle, a throat and a racket face. The throat extending from the handle to the racket face. The racket assembly housing a electronic components which comprise: a controller, a memory, a power sou... | 03/04/2003 |
| 6409616 | Calorie counting racket A calorie counting racket has a skeleton (10) with a hollow grip (11) and a counter unit (20) secured inside the grip (11) with multiple press buttons and a display (25) protruding from a side surface of the grip (11). The counter unit (20) has a micropro... | 06/25/2002 |
| 6364791 | Double loop string vibration damper for sports racquets A string vibration damper, for use on a sports racquet having an interwoven string bed, is made of a soft, elastomeric material and comprises a pair of end members connected by a connecting portion. Each end member has a hole therethrough with a hole diam... | 04/02/2002 |
| 6299557 | Racket gripping device The present invention relates to a device for use in gripping tennis rackets or the like which is of durable construction and which is easy to use, reliable, and efficient in operation. This device assists a tennis player, pro or novice, to maintain a pro... | 10/09/2001 |
| 6270434 | Game racket to show the state of the body of an exerciser A game racket is provided in the grip portion thereof with a sensor for detecting changes in body characteristic of a person engaging in exercise by using the game racket. The changes in body characteristic of the person are detected in the form of electr... | 08/07/2001 |
| 6210296 | Portable tennis scorekeeper device A portable tennis scorekeeper device includes a portable body attachable to an article of apparel or insertable within a pocket of an article of apparel worn by a tennis player and a scoreboard applied to a side of the portable body. The scoreboard includ... | 04/03/2001 |
| 6186912 | Apparatus and method for stringing lacrosse sticks An apparatus and method for stringing traditional pockets for a lacrosse stick is disclosed. The apparatus comprises a plurality of guides that hold thongs typically used in a traditional pocket of a lacrosse stick at any depth desired by a user and guide... | 02/13/2001 |
| 6162138 | Attachments presenting rotation aid surfaces for tennis racquet and method of attaching the same A tennis racquet is provided that has rotation aid attachments attached to the frame at the throat. The attachments include adhesive-backed textured strips attached to the outside surfaces of the arms, or two straps wrapped around the arms of the frame. T... | 12/19/2000 |
| 6132326 | Sports implement customizing system The weight, balance point and swing weight of a sports implement such as a tennis racket can be automatically duplicated using a measuring unit and a computer program that uses data supplied by the measuring unit and data prestored in a database. The meas... | 10/17/2000 |
| 6033324 | Vibration damping device for stringed racquets A vibration damping device for stringed racquets includes a viscoelastic member adapted to be wrapped around at least a pair of strings of the racquet and a moveable member extending through the viscoelastic member moveable relative to the viscoelastic me... | 03/07/2000 |
| 5980403 | Devices and method for maintaining string tension Racket string tension-maintaining means includes a plurality of surface areas between the string receiving openings in the frame of said racket, the surfaces incorporating frictional means engagable with the bights of said strings to prevent the movement ... | 11/09/1999 |
| 5964671 | Variable weight assembly for racket A warm-up and weight training device for use on a sports racket is provided which can be readily secured to and removed from the racket's strings. The device includes two housing portions and a plurality of weights positionable in the housing portions. A ... | 10/12/1999 |
| 5947850 | Tennis ball retriever A tennis ball retriever for detachably mounting on the frame of a tennis racket which reduces the stooping and bending usually required to retrieve a tennis ball from the surface of a tennis court. The retriever comprises a pair of tines which are distort... | 09/07/1999 |