Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-07-27
1981-03-03
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02584468
REFERENCES:
patent: D232480 (1974-08-01), Laughton
patent: D240554 (1976-07-01), Cross et al.
patent: D245847 (1977-09-01), Bevilacqua et al.
patent: D245848 (1977-09-01), Bevilacqua et al.
patent: D245911 (1977-09-01), Bevilacqua et al.
patent: D246046 (1977-10-01), Hawthorne
Beehler Charles A.
Brown Ernest R.
Hawthorne Allen D.
Hofland Robert M.
Barth Carl O.
International Business Machines - Corporation
Kemper Catherine E.
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