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1640560
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Information
Patent Grant
1640560
References
Source
Patent Number
1,640,560
Date Filed
Not available
Date Issued
Tuesday, August 30, 1927
97 years ago
CPC
H02P9/18 - the switching being caused by a servomotor, measuring instrument, or relay
Y10T307/812 - Differential speed between two bodies
US Classifications
322 - Electricity: single generator systems
307 - Electrical transmission or interconnection systems
318 - Electricity: motive power systems
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