Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1986-01-21
1988-09-27
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
Patent
active
D02978164
REFERENCES:
patent: D234578 (1975-03-01), Powers
patent: D235137 (1975-05-01), Muir
patent: D241627 (1976-09-01), Bailey
patent: D241628 (1976-05-01), Bailey
patent: D245765 (1977-09-01), Yoshida
patent: D246351 (1977-11-01), Yoshida
patent: D253042 (1979-10-01), Fee
patent: D253773 (1979-12-01), Bieger
Beusse James H.
Holtje Nelson C.
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