Combined automatic switch and regulator
United States Patent 1765381
Inventors:
Friedrich, Menzel
Publication Date:
06/24/1930
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Assignee:
Bosch, Robert
Primary Class:
Other Classes:
335/178, 322/28, 335/92, 335/255, 335/161, 335/95
International Classes:
H02J7/22; H02J7/16