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Patents for John Derick Barclay
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
GB-1,155,963Jun. 25, 1969J.D. Barclay, J.C. JonesImprovements in or relating to grinding machinesroll grinding machines
GB-1,155,964Jun. 25, 1969J.D. Barclay, J.C. JonesImprovements in or Relating to Grinding Machinesroll grinding machines
CA-838,788Apr. 07, 1970J.D. Barclay, J.C. JonesMotor Control System for Grinding Machinesroll grinding machines
CA-875,208Jul. 06, 1971J.D. Barclay, J.C. JonesGrinding Machinesroll grinding machines
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