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3586941
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Information
Patent Grant
3586941
References
Source
Patent Number
3,586,941
Date Filed
Not available
Date Issued
Tuesday, June 22, 1971
53 years ago
CPC
H02P1/20 - by progressive reduction of resistance in series with armature winding
H02P7/29 - using pulse modulation
H02P7/293 - using phase control
US Classifications
318 - Electricity: motive power systems
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