Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1975-11-13
1977-12-27
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1606
Patent
active
D02467887
REFERENCES:
patent: D174902 (1955-06-01), Gilson
patent: D175215 (1955-07-01), Gilson
patent: D185670 (1959-07-01), Kellogg
patent: D217698 (1970-05-01), Pinsler et al.
patent: 3967880 (1976-07-01), Johnson
Miller Paul D.
Porcelli V. Lorenzo
Simonelli Robert M.
Burke Wallace R.
GAF Corporation
Kehm Walter C.
Kemper Catherine
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