Photography and optical equipment – Projector or viewer – Motion picture type
Patent
1992-04-03
1994-03-29
Douglas, Alan P.
Photography and optical equipment
Projector or viewer
Motion picture type
D 6457, D16221, D20 21
Patent
active
D03455718
REFERENCES:
patent: D235472 (1975-06-01), Geisler
patent: 3144726 (1964-08-01), Alleman
patent: 3212205 (1965-10-01), Alleman
patent: 3314177 (1967-04-01), Mies, Jr. et al.
patent: 4453326 (1984-06-01), Hoffman et al.
Asch Jeffrey
DaMert Co.
Douglas Alan P.
Zimmerman Harris
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