Ear-plug timer

Details Ear-plug timer Ear-plug timer

1988-08-02

1991-09-03

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Time-measuring instrument or casing

D10 15, D10 30

Patent

active

D03195937

REFERENCES:
patent: D60848 (1922-04-01), Brach
patent: D250176 (1978-11-01), Yamagami
patent: D261993 (1981-11-01), Lubs
patent: D264316 (1982-05-01), Loiseau
patent: D270244 (1983-08-01), McCormick
patent: D278313 (1985-04-01), Progin
patent: D281675 (1985-12-01), Rapp
patent: D282446 (1986-02-01), Gremoprez
patent: D304807 (1989-11-01), Iacovelli
patent: D309266 (1990-07-01), Kaneko
patent: D311342 (1990-10-01), Houlihan
Jeweler's Circular-Keystone-4/78-p. 12-Stopwatch at bottom.

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