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Pat. 11108335 United States, Int. Cl.22 H02M 1/36, H02M 5/458, H05H 1/46. Medium- and high-power frequency-adjustable digital power system : Appl. N 16/868494 : Filed 06.05.2020 : Pub. 31.08.2021 : / Ming-Han Nieh ; Assignee Elementech International Co Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11108335/en?oq=US11108335.html (дата обращения: ДД.ММ.ГГГГ).