Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-11-17
1980-05-13
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D14 48, D1603, D1402
Patent
active
D02549751
REFERENCES:
patent: D244280 (1977-05-01), Cross et al.
patent: D248400 (1978-04-01), Alderson et al.
patent: 3414254 (1968-12-01), Snellman et al.
patent: 4134581 (1979-01-01), Johnson et al.
patent: 4141546 (1979-02-01), Queener
Gambrell Joseph L.
Gilleland Gene P.
Hawthorne Allen D.
Hofland Robert M.
McCuiston James A.
Hauptman Gunter A.
International Business Machines - Corporation
Kemper Catherine E.
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