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Patents for John Day Jr.
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
794,354Jul. 11, 1905G.M. HinkleyTimber-transferring machinewoodworking machine material handling
815,312Mar. 13, 1906C.G. SpradoAdjustable piston-rod and cross-head connection
831,982Sep. 25, 1906J.F. PatitzValve for blowing-enginesair compressors
834,788Oct. 30, 1906J. WilsonSteam-turbinerotary steam engines
835,712Nov. 13, 1906J.F. PatitzValve for blowing-enginesair compressors
923,591Jun. 01, 1909C.G. SpradoGas Engineinternal combustion engine governors
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