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Pat. 11252980 United States, Int. Cl.22 H05B 6/54, A23L 3/01, A23L 3/365, H02M 3/338, H05B 6/48. Self-oscillating defrosting apparatus and methods of their operation : Appl. N 16/570069 : Filed 13.09.2019 : Pub. 22.02.2022 : / Pierre Marie Jean Piel, Lionel Mongin, Jeremie Simon ; Assignee Nxp Usa Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US11252980/en?oq=US11252980.html (дата обращения: ДД.ММ.ГГГГ).