Digital clock

Details Digital clock Digital clock

1976-03-08

1977-11-15

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Changeable exhibitor, e.g., digital type

D1001

Patent

active

D02463512

REFERENCES:
patent: D222164 (1971-10-01), Ohta
patent: D222979 (1972-02-01), Hirayama
patent: D227176 (1973-06-01), Franklin
patent: D234507 (1975-03-01), Mori
patent: D242847 (1976-12-01), Cervone
patent: 3845614 (1974-11-01), Christ
patent: 3872235 (1975-03-01), Mancy

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