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Pat. 10379142 United States, Int. Cl.22 G01R 15/00, B23K 9/10, B23K 9/32, G01R 19/00, H01F 27/29, H02M 3/335, H02M 7/06, H02M 7/155, H05K 1/18. Circuit assembly having a transformer with centre tapping and measuring of the output voltage : Appl. N 15/556916 : Filed 01.03.2016 : Pub. 13.08.2019 : / Christian Magerl, Franz Peter Musil, Robert Eberl, Friedrich Steinmaurer ; Assignee Fronius International Gmbh ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10379142/en?oq=US10379142.html (дата обращения: ДД.ММ.ГГГГ).