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Pat. 9899868 United States, Int. Cl.22 H02J 9/06, H02J 3/32, H02J 3/38, H02M 5/293, H02M 5/297, H02M 7/48. Smart transfer switch devices, systems, and methods using double-base bipolar transistors : Appl. N 14/930627 : Filed 02.11.2015 : Pub. 20.02.2018 : / Paul A. Bundschuh, John W. Merritt, William C. Alexander ; Assignee Ideal Power Inc ; NN p. : patents.google.com : URL: https://patents.google.com/patent/US9899868/en?oq=US9899868.html (дата обращения: ДД.ММ.ГГГГ).