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Impedance matching device
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Patent number 10,734,196
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Issue date Aug 4, 2020
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DAIHEN CORPORATION
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Tatsuya Morii
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H01 - BASIC ELECTRIC ELEMENTS
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Filter
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Patent number 10,483,935
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Issue date Nov 19, 2019
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Schaffner EMV AG
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Luca Dalessandro
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H03 - BASIC ELECTRONIC CIRCUITRY
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Electric filter equipment
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Patent number 4,419,660
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Issue date Dec 6, 1983
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ASEA Aktiebolag
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Bernt Bergdahl
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3349348
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Patent number 3,349,348
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Issue date Oct 24, 1967
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H03 - BASIC ELECTRONIC CIRCUITRY
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3159791
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Patent number 3,159,791
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Issue date Dec 1, 1964
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H03 - BASIC ELECTRONIC CIRCUITRY
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2764731
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Patent number 2,764,731
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Issue date Sep 25, 1956
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H03 - BASIC ELECTRONIC CIRCUITRY