Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-06-01
1985-04-16
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 41
Patent
active
D02784416
REFERENCES:
patent: D144687 (1946-05-01), Briskin
patent: D150002 (1948-06-01), Eisenberg
patent: D160038 (1950-09-01), Van Dyck
patent: D188441 (1960-07-01), Reibel
patent: D203563 (1966-01-01), Becking
patent: D218130 (1970-07-01), Macone
patent: D245167 (1977-07-01), Fernandez
patent: D247676 (1978-04-01), Nakahata
Hama Hamaphot KG Hanke & Thomas
Holtje Nelson C.
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