Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1976-12-08
1978-11-07
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
D14 73, D1001
Patent
active
D02501759
REFERENCES:
patent: D228567 (1973-10-01), Nagata
patent: D228938 (1973-10-01), Watanabe
patent: D229212 (1973-11-01), Nagata
patent: D235516 (1975-06-01), Nagata
Caesar A. D.
Holtje Nelson C.
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