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Patents for A. F. Macdonald
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
524,396Aug. 14, 1894W.B. PotterController for Electric Motorsmotor controls
583,935Jun. 08, 1897F.E. Case, W.B. PotterSeries Parallel Controllermotor controls
596,186Dec. 28, 1897E.W. Rice, C.P. SteinmetzPhase Regulatorphase regulators
620,965Mar. 14, 1899E.W. Rice, C.P. SteinmetzAlternating Current Motorinduction motors
620,966Mar. 14, 1899E.W. Rice, Jr., C.P. SteinmetzInduction Motorinduction motors
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