Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1978-08-02
1980-10-07
Holtje, Nelson
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
D10 1, D10 25, D1001
Patent
active
D02572346
REFERENCES:
patent: D115198 (1937-06-01), Ciccarelli
patent: D224801 (1972-09-01), Nagata
patent: D228406 (1973-09-01), Thomas
patent: D252499 (1979-07-01), Shimasaki
Jeweler's Circular-Keystone, p. 114-Clock.
Home Furn. Daily, 6/2/75, p. 2 of supplement-Dig. Clock at center #22536.
Holtje Nelson
Seidel Arthur H.
Simplex Time Recorder Co.
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