Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-12-29
1981-06-23
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1601
Patent
active
D02596407
REFERENCES:
patent: 4114173 (1978-09-01), Tezuka et al.
patent: 4114176 (1978-09-01), Kawasaki
patent: 4134660 (1979-01-01), Sakurada et al.
Kemper Catherine E.
Olympus Optical Company Ltd.
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