Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-03-08
1984-08-14
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D14102
Patent
active
D02751089
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patent: D250954 (1979-01-01), Knodt
patent: D258446 (1981-03-01), Beehler
patent: D268345 (1983-03-01), Robertson
patent: D269971 (1983-08-01), Hara
patent: 4281920 (1981-08-01), Cross
Holtje Nelson C.
The Mead Corporation
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