Electronic clock

Details Electronic clock Electronic clock

1985-09-03

1988-07-26

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Changeable exhibitor, e.g., digital type

D10 6, D10125

Patent

active

D02968762

REFERENCES:
patent: D237878 (1975-12-01), Valentine
patent: D239107 (1976-03-01), Covert
patent: D239110 (1976-03-01), Covert
patent: D251598 (1979-04-01), Gabriel
patent: D255223 (1980-06-01), Odom
patent: D256679 (1980-09-01), Vaughan
patent: D265322 (1982-07-01), Gabriel
patent: D273950 (1984-05-01), Itoh
patent: D281083 (1985-10-01), Gabriel
Principles & Practices of Digital ICS & LEDS--Tab Books--Blueridge Summit, PA. 17214--by Doninbody .COPYRGT.1984--p. 205--LED Clock.

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