Digital clock

Details Digital clock Digital clock

1988-01-15

1991-08-06

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Combined

D10 3, D10 15

Patent

active

D03188060

REFERENCES:
patent: D221462 (1971-08-01), Rittinghouse
patent: D228405 (1973-09-01), Pollard
patent: D237469 (1975-11-01), Niznick
patent: D259862 (1981-07-01), You
patent: D271566 (1983-11-01), Powell
Hong Kong Enterprise--11/87--Clock at top of page 129.

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