Measuring – testing – or signalling instruments – Clock or clock case – Changeable exhibitor – e.g. – digital type
Patent
1990-06-15
1993-02-16
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Clock or clock case
Changeable exhibitor, e.g., digital type
D19 84
Patent
active
D03332721
REFERENCES:
patent: D186702 (1959-11-01), Bunn
patent: D245198 (1977-07-01), Terada
patent: D320944 (1991-10-01), Wada
Holtje Nelson C.
Pollyflame International B.V.
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