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3911937
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Patent number 3,911,937
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Issue date Oct 14, 1975
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3856978
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Patent number 3,856,978
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Issue date Dec 24, 1974
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3801725
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Patent number 3,801,725
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Issue date Apr 2, 1974
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3767837
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Patent number 3,767,837
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Issue date Oct 23, 1973
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3573342
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Patent number 3,573,342
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Issue date Apr 6, 1971
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3573341
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Patent number 3,573,341
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Issue date Apr 6, 1971
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3546356
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Patent number 3,546,356
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Issue date Dec 8, 1970
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3448202
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Patent number 3,448,202
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Issue date Jun 3, 1969
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H01 - BASIC ELECTRIC ELEMENTS
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3391243
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Patent number 3,391,243
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Issue date Jul 2, 1968
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3378731
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Patent number 3,378,731
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Issue date Apr 16, 1968
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3372226
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Patent number 3,372,226
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3331911
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Patent number 3,331,911
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Issue date Jul 18, 1967
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2216010
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Patent number 2,216,010
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Issue date Sep 24, 1940
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H01 - BASIC ELECTRIC ELEMENTS
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2173717
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Patent number 2,173,717
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Issue date Sep 19, 1939
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H01 - BASIC ELECTRIC ELEMENTS
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2141912
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Patent number 2,141,912
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Issue date Dec 27, 1938
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H01 - BASIC ELECTRIC ELEMENTS