Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1981-10-28
1984-05-01
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D14 71
Patent
active
D02736837
REFERENCES:
patent: D191331 (1961-09-01), Hennig
patent: D254738 (1980-04-01), Hoshino
patent: 3165991 (1965-01-01), Yoshida
patent: 3246587 (1966-04-01), Oliver
patent: 3761815 (1973-09-01), Bower
patent: 3824472 (1974-07-01), Engel
patent: 3916122 (1975-10-01), Sato
Hendren C. Dalton
Hendren Connie D.
Holtje Nelson C.
Jaskiewicz Edmund M.
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