Photography and optical equipment – Projector or viewer – Overhead or opaque type
Patent
1995-11-20
1997-07-22
Wallace, Terry A.
Photography and optical equipment
Projector or viewer
Overhead or opaque type
1602
Patent
active
D03813517
REFERENCES:
patent: D197258 (1963-12-01), Highberger
patent: D211760 (1968-07-01), Blomgren et al.
patent: D229780 (1974-01-01), Ishida
patent: D244602 (1977-06-01), Mango et al.
patent: D344533 (1994-02-01), Hasegawa
patent: D349715 (1994-08-01), Darland
patent: D350361 (1994-09-01), Hasegawa
patent: D365836 (1996-01-01), Hasegawa
Overhead Projectors Catalog, 1968 p. 3.
Aronovich Adir
Elmo Company Limited
Wallace Terry A.
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