Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1984-06-22
1987-05-26
Zarfas, Louis S.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02900157
REFERENCES:
patent: D150102 (1948-06-01), Weinstein
patent: D213918 (1969-04-01), Cohen
patent: D246045 (1977-10-01), Suzuki
patent: 2467014 (1949-04-01), Dilks
patent: 2572602 (1951-10-01), Dilks
patent: 4089593 (1978-05-01), Bernard et al.
Hochberg D. Peter
Stereoscopes Lestrade & Cie.
Zarfas Louis S,.
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