Digital clock

Details Digital clock Digital clock

1982-03-15

1984-07-10

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Simulative

Patent

active

D02746069

REFERENCES:
patent: D63896 (1924-02-01), Harshberger
patent: D119385 (1940-03-01), Greene
patent: D150089 (1948-06-01), Murphy
patent: D209411 (1967-11-01), Grant
patent: D260918 (1981-09-01), Orenstein
patent: D266175 (1982-09-01), Zachar
patent: 1147978 (1915-07-01), Schmitt
patent: 2824418 (1958-02-01), Hilbert
Popular Science Monthly-10/36-p. 19-clock "face" at middle-left.

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