Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-10-16
1981-05-19
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1605
Patent
active
D02592622
REFERENCES:
patent: D202231 (1965-09-01), Schroth
patent: D209635 (1967-12-01), Korte
patent: D225573 (1972-12-01), Jones
patent: 2933992 (1960-04-01), Bushnell et al.
patent: 3055283 (1962-09-01), Suzuki
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