Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-02-04
1978-11-14
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02502666
REFERENCES:
patent: D196340 (1963-09-01), Peters
patent: D210751 (1968-04-01), Costa
patent: D217509 (1970-05-01), Merino
patent: 3187626 (1965-06-01), Mindell et al.
patent: 3715155 (1973-02-01), Grupp
Bell & Howell Company
Burke Wallace R.
Kemper Catherine
Walsh Robert A.
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