Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-03-22
1977-11-29
Lucas, Susan J.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606, D0203
Patent
active
D02465299
REFERENCES:
patent: 1878594 (1932-09-01), Mestre
patent: 1946346 (1934-02-01), Baker
Lucas Susan J.
Rambo William S.
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