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Patents for William M. Dudgeon
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
706,850Aug. 12, 1902L.S. PitcherHydraulic jackhydraulic jacks
899,462Sep. 22, 1908J.W. Nelson, W.H. MathersAir-valve for hydraulic jackshydraulic jacks
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