Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1982-06-14
1984-11-20
Holtje, Nelson C.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D14 11
Patent
active
D02764393
REFERENCES:
patent: D211134 (1968-05-01), Robbins
patent: D272542 (1984-02-01), Raymond
patent: D272633 (1984-02-01), Raymond
patent: 3128058 (1964-04-01), Ringle
patent: 4221479 (1980-09-01), Harvey
patent: 4420120 (1983-12-01), Raymond
Holtje Nelson C.
Murphy Bernard J.
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