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Transformer/reactor
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Patent number 6,940,380
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Issue date Sep 6, 2005
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ABB AB
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Mats Leijon
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Electromagnetic device
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Patent number 6,822,363
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Issue date Nov 23, 2004
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ABB AB
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Mats Leijon
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3881647
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Patent number 3,881,647
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Issue date May 6, 1975
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B66 - HOISTING LIFTING HAULING
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3651402
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Patent number 3,651,402
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Issue date Mar 21, 1972
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G01 - MEASURING TESTING
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2721905
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Patent number 2,721,905
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Issue date Oct 25, 1955
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G11 - INFORMATION STORAGE