Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1978-07-18
1980-09-16
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
D10 22, D1001
Patent
active
D02568900
REFERENCES:
patent: D234149 (1975-01-01), Rowman
patent: 2757508 (1956-08-01), Zanetti
patent: 3849978 (1974-11-01), Davis
patent: 3875736 (1975-04-01), Gulko
Gifts & Dec. Access.-2/71-p. 68-Clock at bottom-left.
Jeweler's Circular-Keystone-3/5/74-p. 26-Clock-2nd from top.
Holtje Nelson C.
Supnik Paul D.
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