Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1980-03-10
1982-03-09
Sebastian, Leland A.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02633124
REFERENCES:
patent: D236915 (1975-09-01), Hideshima
patent: D251912 (1979-05-01), Nakade
patent: D257984 (1981-01-01), Kurozumi et al.
Ricoh & Company, Ltd.
Sebastian Leland A.
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