Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1980-07-24
1982-05-04
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02642204
REFERENCES:
patent: D240557 (1976-07-01), Stemmle
patent: D248957 (1978-08-01), Kitai
patent: D251912 (1979-05-01), Nakade
patent: D257984 (1981-01-01), Kurozumi
patent: 4247192 (1981-01-01), Komori
DuBois R. Clark
Hamma John C.
Gradco Dendoki, Inc.
Holtje Nelson C.
Lee, Jr. Newton H.
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