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Pat. 9887639 United States, Int. Cl.22 H02M 3/335, H02J 1/10, H02M 1/00, H02M 1/08, H02M 1/14, H02M 5/458, H02M 7/48, H02M 7/5387. Communication within a power inverter using transformer voltage frequency : Appl. N 15/355843 : Filed 18.11.2016 : Pub. 06.02.2018 : / Patrick L. Chapman ; Assignee Sunpower Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9887639/en?oq=US9887639.html (дата обращения: ДД.ММ.ГГГГ).