Magnetically detectable tennis ball

Details Magnetically detectable tennis ball Magnetically detectable tennis ball

1992-04-01

1996-09-03

Wong, Steven B.

Amusement devices: games

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

Target

273 58G, A63B 6100

Patent

active

055516882

ABSTRACT:
A tennis ball is provided with magnetically detectable properties while still meeting USTA specifications. The magnetic properties are provided by sponge iron powder which is formed from magnetite iron ore. The sponge iron powder is blended with the rubber which is used to mold the core of the ball.

REFERENCES:
patent: 3774194 (1973-11-01), Jokay
patent: 3854719 (1974-12-01), Supran
patent: 3883860 (1975-05-01), von Kohorn
patent: 4071242 (1978-01-01), Supran
patent: 4109911 (1978-08-01), Van Auken
patent: 4299384 (1981-11-01), Van Auken
patent: 4375289 (1983-03-01), Schmall
patent: 4664376 (1987-05-01), Gray
patent: 4664378 (1987-05-01), Van Auken
patent: 4718670 (1988-01-01), Gray
patent: 5082263 (1992-01-01), Berger

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