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