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Pat. 10116229 United States, Int. Cl.22 H02M 5/458. Multilevel cascade hexagonal voltage source converter with isolated DC sources : Appl. N 15/709282 : Filed 19.09.2017 : Pub. 30.10.2018 : / Abdulrahman Abdullah Ali Alshammaa, Abdullah Mohammed Ali Noman, Khaled Ebraheem Addoweesh, Ayman Abdullah Abdulaziz Alabduljabbar, Abdulrahman Ibrahim Alolah ; Assignee King Saud University ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10116229/en?oq=US10116229.html (дата обращения: ДД.ММ.ГГГГ).