Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-10-31
1980-01-29
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1602
Patent
active
D02540754
REFERENCES:
patent: D193411 (1962-08-01), Farber
patent: D242915 (1977-01-01), Wang
patent: 3527530 (1970-09-01), Hughes
Bartholomew Mfg. Co., Inc.
Benn Marvin N.
Burke Wallace R.
Kemper Catherine
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