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Treble frequency converter
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Patent number 4,155,114
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Issue date May 15, 1979
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Toyo Denki Seizo Kabushiki Kaisha
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Zenkichi Tsuchiya
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3767950
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Patent number 3,767,950
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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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3445701
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Patent number 3,445,701
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Issue date May 20, 1969
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3197660
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Patent number 3,197,660
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Issue date Jul 27, 1965
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3177387
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Patent number 3,177,387
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Issue date Apr 6, 1965
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2867738
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Patent number 2,867,738
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Issue date Jan 6, 1959
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2428203
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Patent number 2,428,203
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Issue date Sep 30, 1947
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2399905
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Patent number 2,399,905
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Issue date May 7, 1946
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2306225
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Patent number 2,306,225
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Issue date Dec 22, 1942
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1806386
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Patent number 1,806,386
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Issue date May 19, 1931
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1800028
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Patent number 1,800,028
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Issue date Apr 7, 1931
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1800027
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Patent number 1,800,027
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Issue date Apr 7, 1931
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1768953
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Patent number 1,768,953
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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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1760591
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Patent number 1,760,591
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Issue date May 27, 1930
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1725662
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Patent number 1,725,662
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Issue date Aug 20, 1929
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1642041
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Patent number 1,642,041
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Issue date Sep 13, 1927
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1559103
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Patent number 1,559,103
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Issue date Oct 27, 1925
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1495030
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Patent number 1,495,030
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Issue date May 20, 1924
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1426001
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Patent number 1,426,001
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Issue date Aug 15, 1922
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1008293
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Patent number 1,008,293
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Issue date Nov 7, 1911
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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884831
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Patent number 884,831
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Issue date Apr 14, 1908
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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802619
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Patent number 802,619
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Issue date Oct 24, 1905
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER