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Patents for H. Walker
Patents 16 - 19 of 19
First set of recordsPrevious set of recordsLast set of records
NumberDatePatenteeTitleType
640,084Dec. 26, 1899C.A. Bohner, P.H. BohnerChain Pipe Wrenchchain and strap wrenches
734,329Jul. 21, 1903E.F. HirstAdjustable Wrenchquick adjust wrenches
743,915Nov. 10, 1903W.J. McVickerValve Gear For Explosive Enginesinternal combustion engine valves
751,522Feb. 09, 1904A.A. KochPower Hammerforging machines
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