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All Patents of Type: well digging or drilling tools
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
631,177Aug. 15, 1899H.W. RankJar for Well Drilling Toolswell digging or drilling tools
2,367,292Jan. 16, 1945R.G. Le TourneauBoring Headwell digging or drilling tools
2,610,529Sep. 16, 1952W.H. AtkinsonBoring Headwell digging or drilling tools
2,707,616May 03, 1955R.J. Koch, R.P. SchadBoring Head for Horizontal Drills in Water Collecting Deviceswell digging or drilling tools
2,863,640Dec. 09, 1958G.A. PetersenOffset Boring Head for Augerwell digging or drilling tools
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