Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1989-11-15
1992-01-07
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
D10 78
Patent
active
D03229416
REFERENCES:
patent: D180475 (1957-06-01), Dickinson
patent: D281675 (1985-12-01), Rapp
patent: D304807 (1989-11-01), Iacovelli
patent: D311699 (1919-10-01), Mo
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