Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1986-10-10
1990-01-23
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
D10 23
Patent
active
D03056201
REFERENCES:
patent: D147747 (1947-10-01), Golden
patent: D274703 (1984-07-01), Vogel
patent: D281675 (1985-12-01), Rapp
patent: D282912 (1986-03-01), Clepea
patent: 2434860 (1948-01-01), Oxley
European Jeweler2/80, p. 116, clock at left.
Holtje Nelson C.
Langfield Electronics Co., Inc.
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