Clock and timer attachment for telephones

Details Clock and timer attachment for telephones Clock and timer attachment for telephones

1975-08-20

1976-12-28

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Time-measuring instrument or casing

D1001

Patent

active

D02428474

REFERENCES:
patent: D224933 (1972-10-01), Goldstrand
patent: 3090192 (1963-05-01), Kraft
patent: 3512355 (1970-05-01), Lang
patent: 3882670 (1975-05-01), Woolley
Jeweler's Circular-Keystone -10/74-p. 37-clock.

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