Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-01-07
1978-02-07
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1602
Patent
active
D02471787
REFERENCES:
patent: D224447 (1972-07-01), Catalano et al.
patent: D226683 (1973-04-01), Helgesson
patent: 3953120 (1976-04-01), Badalich et al.
Erber Dennis J.
Kubnick Norman R.
Bell & Howell Company
Burke Wallace R.
Fitz-Gerald Roger M.
Kemper Catherine E.
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