Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1976-10-28
1978-07-18
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
D10 67, D1001
Patent
active
D02485460
REFERENCES:
patent: D111714 (1938-10-01), Rodanet
patent: D236590 (1975-09-01), Torresdal
patent: 3433405 (1969-03-01), Pfleger
patent: 3662535 (1972-05-01), Hedrick
Holtje Nelson C.
Nienow Harvey C.
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