| All Patents of Type: pipe wrenches |
Patents 1 -
15
of 881
      |
| Number | Date | Patentee | Title | Type |
| 6,002 | Jan. 02, 1849 | F.H. Bartholomew, S. Merrick | Screw Wrench For Grasping Cylindrical Forms | pipe wrenches |
| 15,184 | Jun. 24, 1856 | G.A. Jenks | Wrench for Gas-Pipe, etc. | pipe wrenches |
| 18,135 | Sep. 08, 1857 | H.M. Clark | Hinged Claw and Screw-Adjusting Gripper Wrench | pipe wrenches |
| 23,857 | May 03, 1859 | G.B. Phillips | Improvement in Slide-Wrenches for Turning Gas Pipes and Other Round Articles | pipe wrenches |
| 24,175 | May 24, 1859 | H.J. Behrens | Improved Gripping Wrench | pipe wrenches |
| 26,530 | Dec. 20, 1859 | G. Smith | Improvement in Grippers for Grasping and Turning Cylindrical Articles | pipe wrenches |
| 27,622 | Mar. 27, 1860 | J.H. Doolittle | Improved Pipe-Wrench | pipe wrenches |
| 28,053 | May 01, 1860 | W.F. Beecher | Pipe-Wrench | pipe wrenches |
| 30,579 | Nov. 06, 1860 | W. Kearney | Improvements in Wrenches for Pipes and Stud-Bolts | pipe wrenches |
| 31,034 | Jan. 01, 1861 | E. Ripley | Improvements in Wrenches for Turning Pipes, Round Bolts, and Similar Articles | pipe wrenches |
| 31,826 | Mar. 26, 1861 | C.H. Reynolds | Improved Screw-Wrench | pipe wrenches |
| 32,453 | May 28, 1861 | G.B. Phillips | Pipe Wrench | pipe wrenches |
| 33,223 | Sep. 03, 1861 | J.A. Wilcox | Instrument For Turning Pipe or Other Round Rods | pipe wrenches |
| 35,950 | Jul. 22, 1862 | H.F. Read | Improved Pipe-Wrench for Screwing and Unscrewing Metal Pipes | pipe wrenches |
| 35,971 | Jul. 22, 1862 | J.H. Doolittle | Pipe Wrench | pipe wrenches |
