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Patents for William H. Powell
Patents 1 - 7 of 7
First set of recordsLast set of records
NumberDatePatenteeTitleType
284,580Sep. 04, 1883W.G. VernonBand saw machinebandsaws
349,833Sep. 28, 1886B.F. AsperChain-sawsawblades
865,811Sep. 10, 1907W.H. PowellSystem of motor controlmotor controls
865,813Sep. 10, 1907W.H. PowellMethods and means for controlling electric motorsmotor controls
865,814Sep. 10, 1907W.H. PowellMotor-control systemmotor controls
865,816Sep. 10, 1907W.H. PowellMotor-control systemmotor controls
1,051,821Jan. 28, 1913W.H. PowellDynamo-electric machineelectric motors
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