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Pat. 11349336 United States, Int. Cl.22 H02J 9/00, H02J 7/00, H02J 9/06, H02M 1/42, H02M 7/219, H02M 7/44, H02M 1/00. Method for operating power factor correction circuit and method for operating uninterruptible power supply apparatus : Appl. N 17/131789 : Filed 23.12.2020 : Pub. 31.05.2022 : / Yuan-Fang Lai, Hung-Chieh Lin, Chao-Li Kao, Chao-Lung Kuo, Hsin-Chih Chen, Yi-Ping Hsieh ; Assignee Delta Electronics Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11349336/en?oq=US11349336.html (дата обращения: ДД.ММ.ГГГГ).