Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-03-30
1980-01-29
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02540762
REFERENCES:
patent: 3309712 (1967-03-01), Cole
patent: 3573792 (1971-04-01), Reed
patent: 3717117 (1973-02-01), Stanley
patent: 3887913 (1975-06-01), Smith
Breitenkam Fred J.
Landrith James E.
Burke Wallace R.
Kemper Catherine
Lessler Arthur L.
Van Dyk Research Corporation
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