Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1988-07-07
1991-07-09
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
D10 18
Patent
active
D03180182
REFERENCES:
patent: D252801 (1979-09-01), Usuda
patent: D255433 (1980-06-01), Anderson
patent: D264823 (1982-06-01), Satoh
patent: D301839 (1989-06-01), Houlihan
patent: D304691 (1989-11-01), Kubo
patent: D307723 (1990-05-01), Chan
Haken Jack E.
Holtje Nelson C.
U.S. Philips Corporation
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