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All Patents of Type: well drilling machines
Patents 1 - 6 of 6
First set of recordsLast set of records
NumberDatePatenteeTitleType
47,727May 16, 1865W.S. Hunter, S.R. HunterBoring Artesian Wellswell drilling machines
367,783Aug. 09, 1887J.S. BrownWell Drilling and Piping Machinewell drilling machines
410,311Sep. 03, 1889M.T. ChapmanExpansion Drillwell drilling machines
446,622Feb. 17, 1891F.A. FlaneginDrill Jarwell drilling machines
1,679,825Aug. 07, 1928R.J. Holmgreen, J.H. HolmgreenRotary Well Drilling Machinewell drilling machines
1,756,799Apr. 29, 1930F.W. SadlerCasing Cover and Tool Holder for Wellstool holders
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