Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-04-30
1984-11-27
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02765306
REFERENCES:
patent: D225572 (1972-12-01), Knodt
patent: D227034 (1973-05-01), Derby
patent: D245166 (1977-07-01), Bevilacqua
patent: D265830 (1982-08-01), Nakade
patent: D267803 (1983-02-01), Kalvitis
patent: D268682 (1983-04-01), Nakade
Holtje Nelson C.
Tokyo Shibaura Denki Kabushiki Kaisha
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