Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1979-06-18
1981-09-29
Caun, Peter M.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1602
Patent
active
D02609983
REFERENCES:
patent: D220658 (1971-05-01), Christoffersen et al.
patent: 3560083 (1971-02-01), Brownscombe
patent: 4136937 (1979-01-01), Fettig
patent: 4140376 (1979-02-01), Hall
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