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Patents for Ray L. Swift
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
908,462Jan. 05, 1909J.P. HedstromOscillating mechanism for lap-grinding machinesmaking handsaws
953,692Apr. 05, 1910J.P. HedstromRetoothing-machinetool making machines
984,669Feb. 21, 1911J.P. HedstromFeed-finger for saw-sharpening machinessaw sharpening machines
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