Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1985-05-24
1987-11-03
Word, A. Hugo
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
Patent
active
D02925940
REFERENCES:
patent: D246521 (1977-11-01), Krumin et al.
patent: D263821 (1982-04-01), Smith
patent: D268173 (1983-03-01), Guetschow et al.
patent: D282654 (1986-02-01), Perry et al.
patent: 2695965 (1954-11-01), Blair
patent: 3253145 (1966-05-01), Erikson
patent: 3727533 (1973-04-01), Perl
Reid Stella M.
Rinn Corporation
Word A. Hugo
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