Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-04-07
1978-09-12
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
350 36, D1606
Patent
active
D02493500
REFERENCES:
patent: D228676 (1973-10-01), Beecher
patent: 3604779 (1971-09-01), Reinhold
patent: 3744872 (1973-07-01), Akin, Jr. et al.
patent: 3985421 (1976-10-01), Beecher
Ansher Bernard
Gerlach Norman H.
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