Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1987-08-24
1989-12-26
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
Patent
active
D03052079
REFERENCES:
patent: D264716 (1982-06-01), Nakajima
patent: D264718 (1982-06-01), Hoshino
patent: D290371 (1987-06-01), Slayer
European Jeweler, 10/79, p. 119, Clock at top right.
Adams Bruce L.
Holtje Nelson C.
Seikosha Co. Ltd.
Wilks Van C.
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