Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-05-23
1979-12-04
Lucas, Susan J.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606
Patent
active
D02535998
REFERENCES:
patent: 1779015 (1930-10-01), Schmitt
Optical Journal & Review of Optometry, 5-15-1971, p. 74-Temple (left).
Lucas Susan J.
Shepard Charles
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