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Patents for Walter J. Richards
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
854,704May 21, 1907W.J. RichardsDynamo-electric machinemotor commutators
865,820Sep. 10, 1907W.J. RichardsMotor-control systemmotor controls
865,821Sep. 10, 1907W.J. RichardsSystem of motor controlmotor controls
867,154Sep. 24, 1907W.J. RichardsSystem of motor controlmotor controls
867,155Sep. 24, 1907W.J. RichardsMotor-control systemmotor controls
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