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Patents for Cecil W. Hopkins
Patents 1 - 7 of 7
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,822,348Sep. 08, 1931C.W. HopkinsGrinding Machinegrinding machines
1,825,797Oct. 06, 1931C.W. HopkinsGrinding Machinegrinding machines
1,932,969Oct. 31, 1933J.E. Caster, C.W. HopkinsGrinding Machinegrinding machines
1,938,766Dec. 12, 1933C.W. HopkinsGrinding Machinegrinding machines
1,983,853Dec. 11, 1934C.W. HopkinsGrinding Machinegrinding machines
2,042,257May 26, 1936C.W. Hopkins, R.E. HarrisonMachine Toolgrinding machines
2,049,611Aug. 04, 1936C.W. Hopkins, R.E. HarrisonAutomatic Sizing Mechanismgrinding machines
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