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2624040
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Patent number 2,624,040
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Issue date Dec 30, 1952
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H01 - BASIC ELECTRIC ELEMENTS
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2174500
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Patent number 2,174,500
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Issue date Sep 26, 1939
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H01 - BASIC ELECTRIC ELEMENTS
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2127439
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Patent number 2,127,439
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Issue date Aug 16, 1938
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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2048203
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Patent number 2,048,203
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Issue date Jul 21, 1936
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H01 - BASIC ELECTRIC ELEMENTS
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1987998
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Patent number 1,987,998
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Issue date Jan 15, 1935
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H01 - BASIC ELECTRIC ELEMENTS
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1806746
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Patent number 1,806,746
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Issue date May 26, 1931
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H01 - BASIC ELECTRIC ELEMENTS