Slide projector or similar article

Details Slide projector or similar article Slide projector or similar article

1981-03-05

1983-09-20

Holtje, Nelson C.

Photography and optical equipment

Projector or viewer

With provision for transparency magazine

D1602

Patent

active

D02706458

REFERENCES:
patent: D198766 (1964-07-01), Hansen
patent: D199466 (1964-10-01), Olson
patent: D211211 (1968-05-01), Steinbach
patent: D214099 (1969-05-01), Steinbach
patent: D237309 (1975-10-01), Bourke
patent: 3554639 (1971-01-01), Robinson
patent: 3733122 (1973-05-01), Szymber

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