Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1980-05-07
1982-09-28
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02663333
REFERENCES:
patent: D236915 (1975-09-01), Hideshima
patent: D243522 (1977-03-01), Nakade
patent: D254975 (1980-05-01), Gambrell
patent: D261147 (1981-10-01), Lawrence
patent: D261148 (1981-10-01), Lawrence
patent: D261272 (1981-10-01), Lawrence
patent: 3424526 (1969-01-01), Sacre
patent: 4203587 (1980-05-01), Kishi
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