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Pat. 11075587 United States, Int. Cl.22 H02M 7/483, H02J 3/36, H02M 7/537. Modular multilevel converter and sub-module thereof : Appl. N 16/618301 : Filed 28.05.2018 : Pub. 27.07.2021 : / Sung Min Oh, Jung Won Hong, Jun Chol Lee, Hong Ju Jung, Joo Yeon Lee ; Assignee Hyosung Heavy Industries Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11075587/en?oq=US11075587.html (дата обращения: ДД.ММ.ГГГГ).