Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1987-05-28
1990-11-27
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
D10 22
Patent
active
D03124088
REFERENCES:
patent: D223962 (1972-06-01), McQuarrie
patent: D237211 (1975-10-01), Takashima
patent: D240270 (1976-06-01), Kawano
patent: D269534 (1983-06-01), Garth
patent: D271404 (1983-11-01), Chan
patent: D276705 (1984-12-01), Oliveri
Hong Kong Enterprise--6/84--p. 177--"Radio Time Ball", at top.
Daiwa Enterprise Co., Ltd.
Holtje Nelson C.
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