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Pat. 9899925 United States, Int. Cl.22 H02M 3/335, H02M 1/42, H02M 3/158, H02M 1/00, H02M 1/44. Two stage structure for power delivery adapter : Appl. N 14/970481 : Filed 15.12.2015 : Pub. 20.02.2018 : / Honggang Sheng, Choon Ping Chng ; Assignee Google LLC ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9899925/en?oq=US9899925.html (дата обращения: ДД.ММ.ГГГГ).