Clock

Details Clock Clock

1990-04-09

1992-06-23

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Changeable exhibitor, e.g., digital type

D10 21

Patent

active

D03272230

REFERENCES:
patent: D191460 (1961-10-01), Ducommun
patent: D193521 (1962-09-01), Ducommun
patent: D250174 (1978-11-01), Hedgecock
patent: D304161 (1989-10-01), Nomizu
patent: D310032 (1990-08-01), Murata
patent: D311141 (1990-10-01), Murata
patent: D315682 (1991-03-01), Lin
patent: D318622 (1991-07-01), Wada
patent: D321484 (1991-11-01), Yu

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