Photography and optical equipment – Projector or viewer – With provision for transparency magazine
Patent
1977-10-31
1980-01-22
Burke, Wallace R.
Photography and optical equipment
Projector or viewer
With provision for transparency magazine
D1602
Patent
active
D02540100
REFERENCES:
patent: D160589 (1950-10-01), Gilbert
patent: D201528 (1965-06-01), Nemeth
Burke Wallace R.
Kemper Catherine
Lane Joseph M.
Qualidux Industrial Company Limited
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