Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-11-21
1980-06-24
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02555832
REFERENCES:
patent: D236157 (1975-07-01), Sakamoto et al.
patent: D236915 (1975-09-01), Hideshima
patent: D247296 (1978-02-01), Nakade
patent: D249521 (1978-09-01), Murai
Kemper Catherine E.
Ricoh & Company, Ltd.
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