Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-04-01
1978-04-11
Ansher, Bernard
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606, D2605
Patent
active
D02477122
REFERENCES:
patent: D114624 (1939-05-01), Rosenthal
patent: D191141 (1961-08-01), Burlin et al.
patent: 2316301 (1943-04-01), Ullman
patent: 2384528 (1945-09-01), Brandt et al.
patent: 3945717 (1976-03-01), Ryder et al.
Ansher Bernard
Communication Mfg. Co.
Parker Robert L.
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