Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1978-04-25
1980-10-21
Kemper, Catherine E.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D16 06, D1601
Patent
active
D02574349
REFERENCES:
patent: D242447 (1976-11-01), Conner et al.
patent: 4156567 (1979-05-01), Ostrowski
Conner James M.
Pizzuti Donato F.
Reynard John M.
Ryan James M.
Kelleher John J.
Kemper Catherine E.
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