Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-03-03
1978-05-16
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1604, D2302
Patent
active
D02479095
REFERENCES:
patent: D148944 (1948-03-01), Nevell et al.
patent: 1975900 (1934-10-01), Kuenhold
patent: 3641912 (1972-02-01), Mills et al.
patent: 3738251 (1973-06-01), Haaser
Blanchard Russell O.
Noble Edward R.
Burke Wallace R.
Kemper Catherine
Sevald William T.
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