Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-12-07
1985-01-08
Noltje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02771055
REFERENCES:
patent: D195910 (1963-08-01), Olson
patent: D199466 (1964-10-01), Olson
patent: D205805 (1966-09-01), Simonelli
patent: D214099 (1969-05-01), Steinbach
patent: D219074 (1970-10-01), Ainslie
patent: 3411845 (1968-11-01), Pester
patent: 3499708 (1970-03-01), Hall
patent: 3554639 (1971-01-01), Robinson
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