Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1986-04-08
1988-10-25
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02982579
REFERENCES:
patent: D218806 (1970-09-01), Berg
patent: D272251 (1984-01-01), Yoshihama
patent: D277289 (1985-01-01), Sabin
patent: D289300 (1987-04-01), Saito
patent: 3093244 (1963-06-01), Middleton
patent: 4531637 (1985-07-01), Cusmano
Canon Kabushiki Kaisha
Holtje Nelson C.
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