Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1983-10-12
1986-06-24
Zarfas, Louis S.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02843854
REFERENCES:
patent: D195605 (1963-07-01), Stevens et al.
patent: D234371 (1975-02-01), Olson
patent: D272157 (1984-01-01), Raymond
patent: 3898003 (1975-08-01), Aronson et al.
Kando Masahiro
Yanagi Masaaki
Canon Kabushiki Kaisha
Zarfas Louis S,.
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