Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-10-13
1984-12-18
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02768151
REFERENCES:
patent: D199212 (1964-09-01), Vigna
patent: D211419 (1968-06-01), Scott
patent: D223216 (1972-03-01), Saito
patent: D256127 (1980-07-01), Overman
patent: 3981582 (1976-09-01), Bookless
patent: 4037956 (1977-07-01), McKeen
Kando Masahiro
Suzuki Hiroaki
Canon Kabushiki Kaisha
Holtje Nelson C.
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