Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1976-03-04
1977-10-11
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02460467
REFERENCES:
patent: D218201 (1970-07-01), Wagner et al.
patent: D224054 (1972-06-01), Derby et al.
patent: D227931 (1973-07-01), Dalton et al.
patent: D236157 (1975-07-01), Sakamoto et al.
3M Brand "VHS" Copier Flyer, received July 12, 1974.
Burke Wallace R.
Cockburn Joscelyn G.
International Business Machines - Corporation
Kemper Catherine
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