Pulse detector stopwatch

Details Pulse detector stopwatch Pulse detector stopwatch

1997-05-02

1998-04-21

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Watch, wristwatch or case

D10 40, D10 31, 1003

Patent

active

D03935973

REFERENCES:
patent: D312215 (1990-11-01), Houlihan
patent: D344523 (1994-02-01), Kanno
patent: D355916 (1995-02-01), Wathen
patent: D368230 (1996-03-01), Cohen
patent: D373029 (1996-08-01), Young
patent: D380207 (1997-06-01), Wang
patent: D380449 (1997-07-01), Palaton
patent: D381661 (1997-07-01), Althans
patent: 4262842 (1981-04-01), Grover
Beeker's Catalog.Holiday 1989-p. 3-Calculator at bottom-right, 1989.

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