Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-06-29
1980-04-22
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1601
Patent
active
D02547902
REFERENCES:
patent: D228681 (1973-10-01), Swayze
patent: D236916 (1975-09-01), Wolfe
patent: 3938170 (1976-02-01), Winkler et al.
patent: 4012754 (1977-03-01), Waaske
Burke Wallace R.
Kemper Catherine
Rollei-Werke Franke & Heidecke
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