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Variable speed synchronous generator
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Patent number 8,125,095
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Issue date Feb 28, 2012
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Christopher K. Duffey
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Hybrid induction motor
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Patent number 7,439,644
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Issue date Oct 21, 2008
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LG Electronics Inc.
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Jeong-Chul Kim
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Downhole torque generator
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Patent number 7,057,316
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Issue date Jun 6, 2006
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Gregson William Martin Spring
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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3821620
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Patent number 3,821,620
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Issue date Jun 28, 1974
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3686553
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Patent number 3,686,553
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Issue date Aug 22, 1972
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3403313
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Patent number 3,403,313
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Issue date Sep 24, 1968
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2444077
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Patent number 2,444,077
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Issue date Jun 29, 1948
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2309904
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Patent number 2,309,904
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Issue date Feb 2, 1943
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1983896
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Patent number 1,983,896
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Issue date Dec 11, 1934
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1769652
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Patent number 1,769,652
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Issue date Jul 1, 1930
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1751484
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Patent number 1,751,484
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Issue date Mar 25, 1930
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1689525
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Patent number 1,689,525
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Issue date Oct 30, 1928
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1687700
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Patent number 1,687,700
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Issue date Oct 16, 1928
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1637393
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Patent number 1,637,393
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Issue date Aug 2, 1927
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1509985
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Patent number 1,509,985
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Issue date Sep 30, 1924
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER