Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-06-05
1980-11-18
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02575353
REFERENCES:
patent: D204964 (1966-05-01), Wally, Jr.
patent: D218261 (1970-08-01), Johnson et al.
patent: D240161 (1976-06-01), Hall
patent: 3352201 (1967-11-01), Brownscombe
Lehto Eino M.
Zellner John R.
Bell & Howell Company
Kemper Catherine E.
Samlan Alan B.
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