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2813240
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Information
Patent Grant
2813240
References
Source
Patent Number
2,813,240
Date Filed
Not available
Date Issued
Tuesday, November 12, 1957
66 years ago
CPC
H02P1/20 - by progressive reduction of resistance in series with armature winding
H01C10/50 - structurally combined with switching arrangements
H01H1/28 - Assembly of three or more contact-supporting spring blades
H01H21/26 - adapted for operation by a part of the human body other than the hand
US Classifications
318 - Electricity: motive power systems
338 - Electrical resistors
388 - Electricity: motor control systems
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