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Title:
Display device
United States Patent 1791533
Inventors:
Parmele, Walter B.
Application Number:
US24403127A
Publication Date:
02/10/1931
Filing Date:
12/31/1927
Assignee:
Parmele, Walter B.
Primary Class:
Other Classes:
174/152G, 362/123, 428/18, 439/550, D11/118, D26/101
International Classes:
A47G33/06
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