Title:
Display device
United States Patent 1947920
Inventors:
Primrose, Donald L.
Publication Date:
02/20/1934
Export Citation:
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Assignee:
Primrose, Donald L.
Primary Class:
446/134
Other Classes:
310/103
International Classes:
A63H33/26; G09F11/34; A63H33/26; G09F11/00
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