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All Patents in class 408/236
Patents 1 - 15 of 84
First set of recordsNext set of recordsLast set of records
RE3,574Aug. 03, 1869G.F. RiceImprovement in boring-machinedrilling and boring
97,908Dec. 14, 1869G.A. Gray, Jr.Improved radial drilling-machinedrilling and boring
103,157May 17, 1870J. DemingImprovement in Spoke-Tenoning and Hub-Boring Machineswheelwright
110,530Dec. 27, 1870E.J. WorcesterImprovement in boring-machinesdrilling and boring
140,925Jul. 15, 1873J.C. KellerImprovement in metal-drilling machinesdrill presses
142,416Sep. 02, 1873J.J. SheridanImprovement in Boring and Drilling Machinedrilling and boring
157,373Dec. 01, 1874J.C. ChapmanImprovement in hand drilling-machinesdrilling and boring
207,640Sep. 03, 1878J. Barnes, W.F. BarnesImprovement in scroll-sawing machineshuman powered machines
301,984Jul. 15, 1884H.D. HeiserWood-boring machinemultiple spindle drill presses
362,618May 10, 1887A. GordonDrilling-machinedrill presses
374,945Dec. 20, 1887F.B. DemingHub-Boring Machine
380,486Apr. 03, 1888S. HoningerDrilling-machinedrilling and boring
386,566Jul. 24, 1888W.D. TrippHub boring machinewheelwright
421,517Feb. 18, 1890F.H. RichardsDrilling Machinedrill presses
458,581Sep. 01, 1891A.E. JohnsonDrill-pressdrill presses
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