Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1981-01-30
1983-11-01
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 29, D1699
Patent
active
D02712083
REFERENCES:
patent: D207358 (1967-04-01), Potucek
patent: D220065 (1971-03-01), Gabler
patent: D223594 (1972-05-01), Kazuma
patent: 2891736 (1959-06-01), Blaes
patent: 3157102 (1964-11-01), Pfaff
patent: 3223469 (1965-12-01), Cech
patent: 3233957 (1966-02-01), Loveland
patent: 3724774 (1973-04-01), Hamilton-Fey
patent: 3912383 (1975-10-01), Stutz
Brown Barry C.
Daggett Donald G.
Donald Daggett Pty. Limited
Holtje Nelson C.
Syncsound Pty. Limited
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