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Pat. 10797584 United States, Int. Cl.22 H02M 1/12, F24F 11/88, G05F 1/70, H02M 1/42, H02M 7/12, H02M 7/48. Active filter device, air conditioning device, and air conditioning system : Appl. N 16/335745 : Filed 11.07.2017 : Pub. 06.10.2020 : / Reiji Kawashima, Takayuki Fujita, Masaki Kouno ; Assignee Daikin Industries Ltd ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10797584/en?oq=US10797584.html (дата обращения: ДД.ММ.ГГГГ).