Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-09-06
1979-09-18
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D14 43, D16 14, D21 13, D1602, D1402, D2103
Patent
active
D02529327
REFERENCES:
patent: D209636 (1967-12-01), Busch
patent: D236740 (1975-09-01), Bushnell
patent: D247498 (1978-03-01), Persha
patent: D249527 (1978-09-01), Stralka
patent: 2666358 (1954-01-01), Eash
patent: 3861792 (1975-01-01), Donati
patent: 3981573 (1976-09-01), Schwartz
Burke Wallace R.
Kemper Catherine
Pravel B. R.
W. F. Productions
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