Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1981-02-04
1983-01-25
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02677237
REFERENCES:
patent: D176927 (1956-02-01), Perzentka
patent: D209110 (1967-10-01), Bennett
patent: D238497 (1976-01-01), Fossella
patent: D238514 (1976-01-01), Artaud
patent: D256796 (1980-09-01), Plaza
patent: D258432 (1981-03-01), Aderman
patent: D263719 (1982-04-01), McConnell
patent: 3759611 (1973-09-01), O'Connell
Holtje Nelson C.
Tokyo Shibaura Denki Kabushiki Kaisha
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