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Pat. 10063060 United States, Int. Cl.22 H02J 1/00, F03D 7/02, F03D 7/04, H02J 3/38, H02J 3/48, H02J 3/50, H02M 7/04, H02M 7/44, H02P 9/04. Method for feeding electric power into an electric power supply system : Appl. N 14/889413 : Filed 29.04.2014 : Pub. 28.08.2018 : / Alfred Beekmann, Kai Busker ; Assignee Wobben Properties Gmbh ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10063060/en?oq=US10063060.html (дата обращения: ДД.ММ.ГГГГ).