Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-02-02
1977-12-06
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02465884
REFERENCES:
patent: D112619 (1938-12-01), Schwartzmann
patent: D198549 (1964-06-01), Graw
patent: D204833 (1966-05-01), Robbins et al.
patent: D213142 (1969-01-01), Rait
patent: 3229608 (1966-01-01), Staub et al.
patent: 3308555 (1967-03-01), Kruger
patent: 3660911 (1972-05-01), Buckingham
patent: 3739486 (1973-06-01), Kallenberg
Buckingham Graphics, Inc.
Burke Wallace R.
Kemper Catherine
Trexler Richard R.
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