Circuit controller
United States Patent 2198277
Inventors:
Schellenger, Newton C.
Publication Date:
04/23/1940
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Export Citation:
Assignee:
Chicago, Telephone Supply Compa
Primary Class:
Other Classes:
200/446, 218/8, 200/416, 338/172, 338/184
International Classes:
H01C10/36; H01C10/00