Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-07-29
1978-08-15
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02489589
REFERENCES:
patent: 3752413 (1973-08-01), Caruso
patent: 3768748 (1973-10-01), Pfefer
patent: 3829035 (1974-08-01), Backscheider
Burke Wallace R.
Kemper Catherine
Limbach Karl A.
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