Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1984-10-12
1985-10-22
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02810735
REFERENCES:
patent: D257260 (1980-10-01), Shiraishi
patent: D276621 (1984-12-01), Hanke
patent: 2332504 (1943-10-01), Brenner
patent: 2650788 (1953-09-01), Hulstein
patent: 3908945 (1975-09-01), Shapiro
patent: 3921947 (1975-11-01), Adam
patent: 4121799 (1978-10-01), Michio
patent: 4214724 (1980-07-01), Geiger
patent: 4377269 (1983-03-01), Sellner
Hama Hamaphot KG Hanke & Thomas
Holtje Nelson C.
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