Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-10-19
1979-04-03
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606
Patent
active
D02514940
REFERENCES:
patent: 2282151 (1942-05-01), Austin
patent: 2349013 (1944-05-01), Sparling
patent: 2377109 (1945-05-01), Schwartz et al.
patent: 2897816 (1959-08-01), Williams
patent: 3880495 (1975-04-01), Roubal
Lawhon Charles L.
Richards Victor
Burke Wallace R.
Dilts Robert W.
Kemper Catherine
Richards Victor
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