21
Lars E G Sjosward: Sports shoe soles. Harness Dickey & Pierce, June 26, 1984: US04455765 (82 worldwide citation)

A sole for use in sports shoes, particularly tennis shoes. The sole comprises an insole, a midsole of a comparatively soft, compressible and resilient material, and an outsole. The latter is formed with a central portion of a compressible and resilient material possessing a high coefficient of frict ...


22
Improvements in or relating to golf clubs and the like. James Hamilton Stirling, March 22, 1923: GB194823-A (77 worldwide citation)

194,823. Stirling, J. H. Dec. 23, 1921. Golf clubs; handles.- Relates to golf clubs, cricket bats, tennis rackets, and the like of the kind wherein the weight and balance may be varied by means of adjustable weights mounted on a stem which is provided with a cap and fits into a cavity in the club &c ...


23
Glenn W Johnson Jr: Pneumatic arm band for localized arm pressure. S Michael Bender, December 16, 1986: US04628918 (75 worldwide citation)

A band or strap adapted to be circumferentially fitted about the arm to alleviate the symptoms of tennis elbow. The band incorporates inwardly protruding means of limited circumferential extent for applying a radially directed pressure against that portion of the extensor muscle coextensive therewit ...


24
Armin A Dassler: Athletic shoe, especially tennis shoe. PUMA Sportschuhfabriken Rudolf Dassler KG, Antonelli Terry & Wands, August 23, 1983: US04399621 (71 worldwide citation)

Athletic shoes, particularly tennis shoes, are known which are provided with an ankle support in the zone of the arch of the foot (plantar arch) between the ball and the heel. In many such athletic shoes with ankle joint supports, the tread sole is fashioned with a corresponding constriction in the ...


25
Frederick T Haas Jr: Playing surface for athletic games. MOD SOD Sport Surfaces, Schuyler Birch Swindler McKie & Beckett, August 23, 1977: US04044179 (70 worldwide citation)

A playing surface for athletic games, such as tennis, comprising a flat, firm subsurface, a pile fabric disposed on the subsurface comprising a relatively flexible, moisture-impermeable backing and normally generally upstanding pile elements resembling grass, a compacted layer of granular mineral ma ...


26
Kenneth N Telford: Portable swing speed analyzer. Telford Golf Enterprises, Novatech IP Law, August 10, 2010: US07771263 (69 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 ...


27
Hideo Yoshizawa, Motomi Katayama: Image synthesis method, games machine, and information storage medium. Namco, Oliff & Berridge, April 4, 2000: US06045447 (69 worldwide citation)

An objective of this invention is to increase the variety of game stages and thus provide a player with a personally-designed game stage. This invention relates to a competitive game in which the player can select one of a plurality of game stages, such as a tennis court. Thus an image is created fo ...


28
Craig Enokian: Video game with playback of live events. Ernest Kettelson, May 5, 1987: US04662635 (68 worldwide citation)

A video game in which a television screen or cathode ray tube is used to display a variety of plays previously preformed by living beings and recorded at the time on a video recording medium, such as video tape or video disks, the particular previously performed play which is displayed during each t ...


29
Rafael J Guerra: Footwear with optical fiber illuminating display areas and control module. McHale & Slavin PA, September 29, 1998: US05813148 (66 worldwide citation)

Footwear with optical fiber illuminating display areas provides emphasis on illuminating certain features of the footwear, such as trademarks, logos, team sports, cartoon characters, and other artistic designs primarily for advertising, decoration and enhancing the visibility of the wearer. Footwear ...


30
William J Balka Jr: Automatic ball server. H Hume Mathews, June 17, 1980: US04207857 (65 worldwide citation)

Automatic ball serving apparatus for serving, lobbing, volleying or smashing balls, such as tennis balls, for practice purposes wherein two cans or buckets are vertically stacked to form a lower generally cylindrical compressed air chamber and an upper generally cylindrical ball feed chamber, a ball ...



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