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Auto-balancing transformers
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Patent number 11,309,933
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Issue date Apr 19, 2022
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Hitachi Energy Switzerland AG
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Parag Upadhyay
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Tunable balun
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Patent number 9,705,536
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Issue date Jul 11, 2017
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Marvell World Trade Ltd.
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Luca Fanori
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H03 - BASIC ELECTRONIC CIRCUITRY
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Self-adjusting hybrid network
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Patent number 4,297,536
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Issue date Oct 27, 1981
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U.S. Philips Corporation
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Robert B. Buchner
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Autobalance hybrid circuit
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Patent number 4,103,118
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Issue date Jul 25, 1978
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Synanon Foundation, Inc.
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Jay Richard Bergman
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Automatic cable balancing network
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Patent number 4,096,362
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Issue date Jun 20, 1978
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Bell Telephone Laboratories, Incorporated
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Charles David Crawford
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Automatic cable balancing network
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Patent number 3,982,080
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Issue date Sep 21, 1976
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Bell Telephone Laboratories, Incorporated
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Richard Larry Ukeiley
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3875350
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Patent number 3,875,350
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Issue date Apr 1, 1975
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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3178521
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Patent number 3,178,521
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Issue date Apr 13, 1965
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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2302374
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Patent number 2,302,374
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Issue date Nov 17, 1942
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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1140946
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Patent number 1,140,946
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Issue date May 25, 1915
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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977142
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Patent number 977,142
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Issue date Nov 29, 1910
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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827918
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Patent number 827,918
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Issue date Aug 7, 1906
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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817921
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Patent number 817,921
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Issue date Apr 17, 1906
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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779508
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Patent number 779,508
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Issue date Jan 10, 1905
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H04 - ELECTRIC COMMUNICATION TECHNIQUE