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Pat. 10218275 United States, Int. Cl.22 H02M 3/24, H02J 3/38, H02M 1/00, H02M 3/07, H02M 7/44, H02M 7/48. Multi-stage voltage multiplication circuit for inverting a direct current power signal : Appl. N 15/667419 : Filed 02.08.2017 : Pub. 26.02.2019 : / Randall L. Sandusky, Neaz E. Farooqi ; Assignee Smart Prong Technologies Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US10218275/en?oq=US10218275.html (дата обращения: ДД.ММ.ГГГГ).