Sports racquet

Details Sports racquet Sports racquet

1978-10-02

1980-06-10

Phillips, Charles E.

Amusement devices: games

Aerial projectile game; game element or accessory therefor...

Target

A63B 4900

Patent

active

042069173

ABSTRACT:
The strings of a tennis racquet are tensioned by passing over a liquid-containing flexible tube in the frame of the racquet with means provided in the handle of the racquet for providing pressure to the liquid in the tube to increase or decrease the tension of the strings.

REFERENCES:
patent: 360468 (1887-05-01), Phelps
patent: 2034444 (1936-03-01), Rauch et al.

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