Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1979-09-12
1981-11-17
Caun, Peter M.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1601
Patent
active
D02618940
REFERENCES:
patent: D233561 (1974-11-01), Yoshino
patent: D249949 (1978-10-01), Mielke et al.
Caun Peter M.
Rollei-Werke Franke & Heidecke
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