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Patents for A. F. Macdonald
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
596,186Dec. 28, 1897E.W. Rice, C.P. SteinmetzPhase Regulatorphase regulators
620,965Mar. 14, 1899C.P. Steinmetz, E.W. RiceAlternating Current Motorinduction motors
620,966Mar. 14, 1899C.P. Steinmetz, E.W. Rice, Jr.Induction Motorinduction motors
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