Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1981-06-12
1983-10-04
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D21168, D1601
Patent
active
D02708396
REFERENCES:
patent: D59051 (1921-09-01), Wilcox
patent: D88116 (1932-10-01), Teague
patent: D149093 (1948-03-01), Seymour
patent: D184521 (1959-03-01), Grimes
patent: D217304 (1970-04-01), Doblin
patent: D222627 (1971-11-01), Cohn
patent: D263716 (1982-04-01), Globus
patent: 957666 (1910-05-01), Ferguson
patent: 4072973 (1978-02-01), Mayo
Modern Plastics, 9/70, p. 28, Mick-A-Matic Camera.
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