Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1975-06-13
1977-05-24
Stearman, Joel
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1604
Patent
active
D02444461
REFERENCES:
patent: D229367 (1973-11-01), Maugham
patent: 2522049 (1950-09-01), Lang
patent: 3203540 (1965-08-01), Kalt et al.
Photomethods, 4-1975, p. 21, Agnekolor Print Processor.
Rademaker C. A.
Sokolski Edward A.
Stearman Joel
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