Tennis rackets

Details Tennis rackets Tennis rackets

1996-08-09

1999-04-13

Stoll, William E.

Games using tangible projectile

Player held and powered, nonmechanical projector, per se,...

Racket or paddle; accessory therefor

A63B 4900

Patent

active

058938109

ABSTRACT:
A tennis racket having a striking surface and a handle in combination has a strung total weight of less than 245 g, an overall length larger than 70 cm, a free-free vibrational frequency in the first mode of more than 210 Hz, a center of gravity of more than 41 cm, and a dynamic center of gravity of more than 50 cm, measured from the handle end.

REFERENCES:
patent: 31419 (1861-02-01), Utley
patent: Re31419 (1983-10-01), Frolow
patent: Re33372 (1990-10-01), Frolow
patent: Re34067 (1992-09-01), Mortvedt et al.
patent: Re34068 (1992-09-01), Mortvedt et al.
patent: 1539019 (1925-05-01), Nikonow
patent: 3801099 (1974-04-01), Lair
patent: 4291574 (1981-09-01), Frolow
patent: 5062634 (1991-11-01), Strauch et al.
patent: 5368295 (1994-11-01), Severa et al.
patent: 5507486 (1996-04-01), Miyamoto
Wilson Sporting Goods Co., 1991 Brochure.

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