31
Kenneth N Telford: Portable swing speed analyzer. Telford Golf Enterprises, Novatech IP Law, August 10, 2010: US07771263 (63 worldwide citation)

Provided is a swing speed analyzer for mounting on a swinging implement and comprising a first accelerometer, a processor and a shock attenuator. The processor uses an output from the first accelerometer to compute a swing speed of the swinging implement. The shock attenuator is comprised of a mater ...


32
Thomas J Walls: Multi-sport exerciser. John H Calhoun Jr, May 11, 1982: US04328964 (63 worldwide citation)

An apparatus for exercising and developing the muscles used in certain athletic endeavors comprising a plurality of elastic ropes, means for anchoring one end of each elastic rope to a stationary object, a plurality of handles made to conform in size, shape and construction to handles commonly used ...


33
Bruce W Harrell: Detachable shoe-pocket system. John F McClellan Sr, April 2, 1985: US04507882 (62 worldwide citation)

A quick-attach, quick-detach shoe accessory in the form of a container for carrying keys, rings, paper money, coins and like items on the instep of a tennis shoe or other lace type shoe, has a sheath-like body with open top end with a covering flap and closed bottom and pleated sides securable to a ...


34
Bobby V Hundley: Dual compartment food tray. Emrich & Dithmar, January 17, 1995: US05381901 (62 worldwide citation)

A nestable food or snack tray having a pair of recessed food storage compartments each adapted to receive and hold food is vacuum molded from a single sheet of lightweight plastic, such as polystyrene. A first recessed compartment is shaped in the form of an athletic field or stadium such as a tenni ...


35
Hiroshi Matsumura, Koji Nii: Grip tape. Asahi Kagaku Kogyo, Lowe Price Leblanc & Becker, October 8, 1991: US05055340 (60 worldwide citation)

A grip tape for wrapping the gripping handle of a tennis racket, a badminton racket, a golf club, or the like which includes a porous flexible sheet with numerous thin holes provided by coating a polyurethane on a nonwoven fabric so as to provide the user with various effects such as a smooth touch ...


36
Stephen J Davis, Andre Terzaghi: Long tennis racquet. Prince Sports Group, White & Case, November 7, 1995: US05464210 (59 worldwide citation)

A tennis racquet has an overall length greater than 28 inches, preferably between 29 and 32 inches, an egg shape strung surface having a length of at least 14 inches, and a strung surface area greater than 95 square inches. The frame is of widebody construction and formed of a composite material so ...


37
Green Wallace V: Automatically operated spring-type projectile projecting device. October 5, 1971: US3610223 (58 worldwide citation)

A tennis ball launcher described wherein one ball at a time is selected from a hopper containing a supply of balls and positioned in a ball feed mechanism on a pair of spaced parallel supports. A mounted rotatable cylinder through which the balls pass from the hopper to the ball feed assembly has a ...


38
Samuel F Stewart: Racket weighting means. Lee & Smith, October 4, 1977: US04052061 (57 worldwide citation)

An improved racket weighting device for use with any existing racket having a shaft with a throat connected to a frame during warm-up, practice or actual play in sports such as tennis, badminton, squash or the like. The device includes a non-continuous flexible member adapted to be wrapped at least ...


39
Tranfield George: Pile fabric method and product. Chas W House & Sons Incorporated, August 15, 1972: US3684284 (57 worldwide citation)

A pile fabric designed particularly for use as a cover of a tennis ball. The fabric has a base structure comprising knitted cotton yarns, preferably in two layers laid back-to-back. A pile surface is provided on one side of the base structure by a fleece preferably composed of a plurality of carded ...


40
Horst K Wieder, Klaus A Wieder: Elastic pull-type exerciser. John M Diehl, November 22, 1977: US04059265 (55 worldwide citation)

Grip member for elastic cord used for exercising contains two parallel cylindrical bores with slightly greater diameter than the cable, to slidingly receive the cable and prevent sliding of the cable through the grip member and permit adjusting of the active length of the cable used in any specific ...



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