Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-05-12
1979-05-08
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D14 48, D1603, D1402
Patent
active
D02517892
REFERENCES:
patent: D220008 (1971-02-01), Johnson
patent: D227600 (1973-07-01), Noyes
patent: D236378 (1975-08-01), Yanofsky
patent: 3927878 (1975-12-01), Bolsenga et al.
patent: 3988018 (1976-10-01), Tusso et al.
Burke Wallace R.
Kemper Catherine
Lessler Arthur L.
Van Dyk Research Corporation
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