Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1980-06-09
1982-09-14
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1604
Patent
active
D02661705
REFERENCES:
patent: D199285 (1964-09-01), Robbins
patent: D204832 (1966-05-01), Vigna
patent: D204833 (1966-05-01), Robbins
patent: D236158 (1975-07-01), Hope
patent: 3087406 (1963-04-01), Dutch
patent: 3747499 (1973-07-01), Foster
patent: 4143959 (1979-03-01), Fischer
Friedman Eugene F.
Holtje Nelson C.
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