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Pat. 9973097 United States, Int. Cl.22 H02M 3/335, B64D 47/00, H02M 1/08, H02M 1/36, H02M 1/42, H02M 1/44, H02M 7/04, H02M 1/00. Regulating transformer rectifier unit with multiple circuits for preventing output overvoltage : Appl. N 15/188723 : Filed 21.06.2016 : Pub. 15.05.2018 : / Warren J. Wambsganss ; Assignee Astronics Advanced Electronic Systems Corp ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9973097/en?oq=US9973097.html (дата обращения: ДД.ММ.ГГГГ).