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Pat. 10530273 United States, Int. Cl.22 H02M 7/5387, H02J 3/18, H02J 3/38, H02M 1/00, H02M 1/088, H02M 1/42, H02M 1/44. Unfolding bridge, inverter having reactive-power capability, and polarity reversing method : Appl. N 15/884653 : Filed 31.01.2018 : Pub. 07.01.2020 : / Jens Friebe, Peter Lahnor, Oliver Prior ; Assignee Sma Solar Technology Ag ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10530273/en?oq=US10530273.html (дата обращения: ДД.ММ.ГГГГ).