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Pat. 10218262 United States, Int. Cl.22 H02M 5/40, B66B 1/30, H02M 1/42, H02M 7/12, H02M 7/68, H02P 5/46, H02P 27/08. Hybrid direct current link system for a regenerative drive : Appl. N 15/713829 : Filed 25.09.2017 : Pub. 26.02.2019 : / Ismail Agirman ; Assignee Otis Elevator Co ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10218262/en?oq=US10218262.html (дата обращения: ДД.ММ.ГГГГ).