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Pat. 11394304 United States, Int. Cl.22 H02M 3/335, B23K 9/10, H02M 1/00, H02M 1/08, H02M 1/34, H02M 1/40, H02M 3/337. Power supply having two quadrant converter and techniques for operation : Appl. N 16/794608 : Filed 19.02.2020 : Pub. 19.07.2022 : / Andrzej Mnich ; Assignee Esab Ab ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11394304/en?oq=US11394304.html (дата обращения: ДД.ММ.ГГГГ).