Tennis service watches for instantaneous display of the...

Details Tennis service watches for instantaneous display of the... Tennis service watches for instantaneous display of the...

1998-06-19

2001-12-11

Hoff, Marc S. (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Speed

C702S149000, C702S160000, C073S488000, C368S002000, C368S010000, C368S110000

Reexamination Certificate

active

06330520

ABSTRACT:

BACKGROUND OF THE INVENTION
It is important for the player and the spectator to know the speed of the serve ball. Radar installations are not within the reach of the majority of tennis clubs, and amateurs wish to know their performances.
BRIEF SUMMARY OF THE INVENTION
The present invention concerns a wristwatch which allows immediate reading of the speed. The watch of the present invention is independent of the system which calculates this speed, and is only a practical and elegant support.


REFERENCES:
patent: 4371945 (1983-02-01), Karr et al.
patent: 4780864 (1988-10-01), Houlihan
patent: 4887249 (1989-12-01), Thinesen
patent: 4959807 (1990-09-01), Thompson et al.
patent: 5163014 (1992-11-01), Calimeri
patent: 5864061 (1999-01-01), Dilz, Jr.

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