Electronic flash device

Details Electronic flash device Electronic flash device

1980-07-31

1982-08-17

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1605

Patent

active

D02658313

REFERENCES:
patent: D234370 (1975-02-01), Oberheim
patent: D239204 (1976-03-01), Ho
patent: D246589 (1977-12-01), Holtje
patent: D250894 (1979-01-01), Ozawa
patent: 4260231 (1981-04-01), Kawarada

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