Method of and system for determining position of tennis ball rel

Details Method of and system for determining position of tennis ball rel Method of and system for determining position of tennis ball rel

1990-11-06

1992-01-21

Grieb, William H.

Amusement devices: games

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

Target

273 61R, 340323R, A63B 6100

Patent

active

050822632

ABSTRACT:
A tennis ball is provided with a radar signal reflecting element, so that during a tennis game a radar sends a signal to the tennis ball and receives a reflected signal which is compared by a computer with a stored position of a tennis court to determine a position of the tennis ball relative to the tennis court.

REFERENCES:
patent: 3774194 (1973-11-01), Jokay et al.
patent: 3854719 (1974-12-01), Supran
patent: 4109911 (1978-08-01), Van Auken
patent: 4257594 (1981-03-01), Conrey et al.
patent: 4422647 (1983-12-01), Wilson et al.
patent: 4664378 (1987-05-01), Van Auken
patent: 4673183 (1987-06-01), Traham
patent: 4855711 (1989-08-01), Harrop et al.
patent: 4866414 (1989-09-01), Diaconu et al.

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