Digital clock

Details Digital clock Digital clock

1981-12-24

1984-07-17

Zarfas, Louis S.

Measuring, testing, or signalling instruments

Clock or clock case

Changeable exhibitor, e.g., digital type

D10 26

Patent

active

D02747030

REFERENCES:
patent: D138747 (1944-09-01), Parker
patent: D158096 (1950-04-01), Kaufman
patent: D201453 (1965-06-01), Shipley
patent: D259184 (1981-05-01), Francis et al.
patent: D263934 (1982-04-01), Fuerneisen

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