Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-06-18
1978-03-14
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02474999
REFERENCES:
patent: D197540 (1964-02-01), Knowles
patent: D200984 (1965-04-01), Knowles
patent: D202668 (1965-10-01), Obergfell
patent: D210752 (1968-04-01), Austin
patent: 3342100 (1967-09-01), Maloney et al.
Kearney Robert L.
Sather Eugene
Bell & Howell Company
Burke Wallace R.
Kemper Catherine E.
Walsh Robert A.
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