Photograpic timer

Details Photograpic timer Photograpic timer

1979-03-22

1981-08-11

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Time-measuring instrument or casing

D1003

Patent

active

D02601389

REFERENCES:
patent: D232815 (1974-09-01), Niwell
patent: D237260 (1975-10-01), Innes
patent: D239819 (1976-05-01), Goy
patent: D243748 (1977-03-01), Krause
patent: D250934 (1979-01-01), Fannin
patent: D252614 (1979-08-01), Thornberry
Popular Science, 2/79, p. 112, "Quadtimer," at top.
European Jeweler, 5/75, p. 73, Timer at top.

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