Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-11-27
1981-09-29
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02609991
REFERENCES:
patent: D178689 (1956-09-01), Oiler
patent: 2003190 (1935-05-01), Hineline
patent: 2397668 (1946-04-01), Kesses
patent: 3040640 (1962-06-01), Abel, Jr. et al.
patent: 3424527 (1969-01-01), Bremson, Jr.
patent: 3810694 (1974-05-01), Harrell et al.
3,272,106 09001966 Czekalla 355 18 X
Kemper Catherine E.
Post-R-Matic, Inc.
Supnik Paul D.
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