Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1985-07-26
1988-07-05
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
D10 21, D10 26
Patent
active
D02965275
REFERENCES:
patent: D79389 (1929-09-01), Saunders
patent: D96431 (1935-07-01), Van Bloem
patent: D96446 (1935-08-01), Carlson
patent: D127984 (1941-07-01), Whyte
patent: D216717 (1970-03-01), Johnson
patent: D274703 (1984-07-01), Vogel
patent: D279552 (1985-07-01), Maglioli
patent: 4491425 (1985-01-01), Young-Koo
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