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Rotary frequency-changer
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Patent number 4,035,711
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Issue date Jul 12, 1977
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Hans Piller
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3886426
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Patent number 3,886,426
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Issue date May 27, 1975
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B60 - VEHICLES IN GENERAL
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3751698
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Patent number 3,751,698
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Issue date Aug 7, 1973
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3626261
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Patent number 3,626,261
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Issue date Dec 7, 1971
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3611113
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Patent number 3,611,113
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Issue date Oct 5, 1971
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3164698
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Patent number 3,164,698
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Issue date Jan 5, 1965
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3026486
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Patent number 3,026,486
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Issue date Mar 20, 1962
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2861154
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Patent number 2,861,154
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Issue date Nov 18, 1958
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2851562
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Patent number 2,851,562
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Issue date Sep 9, 1958
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2851561
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Patent number 2,851,561
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Issue date Sep 9, 1958
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2821609
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Patent number 2,821,609
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Issue date Jan 28, 1958
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2814763
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Patent number 2,814,763
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Issue date Nov 26, 1957
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2789187
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Patent number 2,789,187
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Issue date Apr 16, 1957
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2709803
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Patent number 2,709,803
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Issue date May 31, 1955
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2650305
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Patent number 2,650,305
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2645698
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Patent number 2,645,698
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Issue date Jul 14, 1953
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2566073
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Patent number 2,566,073
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Issue date Aug 28, 1951
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2565005
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Patent number 2,565,005
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Issue date Aug 21, 1951
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2518030
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Patent number 2,518,030
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Issue date Aug 8, 1950
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E04 - BUILDING
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2486641
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Patent number 2,486,641
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Issue date Nov 1, 1949
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G05 - CONTROLLING REGULATING
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2389391
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Patent number 2,389,391
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2300770
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Patent number 2,300,770
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Issue date Nov 3, 1942
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2289888
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Patent number 2,289,888
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Issue date Jul 14, 1942
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2268375
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Patent number 2,268,375
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Issue date Dec 30, 1941
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2262505
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Patent number 2,262,505
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Issue date Nov 11, 1941
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2254247
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Patent number 2,254,247
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Issue date Sep 2, 1941
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2050922
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Patent number 2,050,922
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Issue date Aug 11, 1936
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2038954
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Patent number 2,038,954
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Issue date Apr 28, 1936
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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1972528
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Patent number 1,972,528
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Issue date Sep 4, 1934
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER