Digital clock

Details Digital clock Digital clock

1976-03-01

1977-10-25

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Changeable exhibitor, e.g., digital type

D1001

Patent

active

D02461587

REFERENCES:
patent: D14392 (1883-11-01), Davies
patent: D76595 (1928-10-01), Balzer
patent: D107079 (1937-11-01), Hedfield
patent: D219109 (1974-11-01), Thomas
patent: D230194 (1974-01-01), Buckler
patent: D230623 (1974-03-01), Nakamoto
patent: D232526 (1974-08-01), Wallach
patent: 2202581 (1940-05-01), Hammer
Washington Post Mag. "Potomac"--12/8/74--Timesquare upper left.

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