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Pat. 9893633 United States, Int. Cl.22 H02M 3/335, H02M 1/08, H02M 1/14, H02M 1/32. Modular multilevel DC-DC converter and associated method of use : Appl. N 15/467738 : Filed 23.03.2017 : Pub. 13.02.2018 : / Hui Li, Yuxiang Shi ; Assignee Florida State University Research Foundation Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9893633/en?oq=US9893633.html (дата обращения: ДД.ММ.ГГГГ).