Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1979-10-18
1981-10-27
Caun, Peter M.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1603
Patent
active
D02615223
REFERENCES:
patent: D244280 (1977-05-01), Cross et al.
patent: D248400 (1978-07-01), Alderson et al.
patent: D251789 (1979-05-01), Hoyt
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