Digital clock

Details Digital clock Digital clock

1991-10-23

1994-10-25

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Changeable exhibitor, e.g., digital type

D10 30, D10 38

Patent

active

D03517977

REFERENCES:
patent: D235741 (1975-07-01), Friedman
patent: D262608 (1982-01-01), Drobshoff
patent: D270244 (1983-08-01), McCormick
patent: D282446 (1986-02-01), Gremonprez
patent: D290371 (1987-06-01), Slayer
patent: D303767 (1989-10-01), Baird
patent: D334347 (1993-03-01), White
patent: 4419016 (1983-12-01), Zoltan

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