Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-09-08
1977-11-22
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1601
Patent
active
D02464608
REFERENCES:
patent: D186436 (1959-10-01), Hodgman
patent: D233561 (1974-11-01), Yoshino
Burke Wallace R.
Kemper Catherine
Osann Robert
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