Method Of Operating Electro Magnetic Motors No. 401,520. Patented Apr. 16, 1889. Damir Kapustic / Thursday, October 14, 2021 Alternating Current Electro Magnetic Motor Dynamo Electric Machine Or Motor Print Tags patents Related articles Regulator For Alternate Current Motors Method Of Operating Electro Magnetic Motors Reciprocating Engine Commutator For Dynamo Electric Machines Steam Engine