Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-10-04
1981-12-22
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02623757
REFERENCES:
patent: D218200 (1970-07-01), Hertel et al.
patent: D222298 (1971-10-01), Ishii
patent: D247296 (1978-02-01), Nakade
Imada Michio
Toyoguchi Kyo
Kemper Catherine E.
Olympus Optical Company Ltd.
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