Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-02-07
1978-12-26
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1602
Patent
active
D02506513
REFERENCES:
patent: 2646636 (1953-07-01), Gandee
patent: 2902787 (1959-09-01), Cook
patent: 3195258 (1965-07-01), Gwin
patent: 3402491 (1968-09-01), Wagner
patent: 3651512 (1972-03-01), Summers
patent: 3666936 (1972-05-01), Webster, Jr. et al.
patent: 3803737 (1974-04-01), Beckett
Burke Wallace R.
Kemper Catherine
Sutton Paul J.
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