| Patents for John C. Chapman |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 37,332 | Jan. 06, 1863 | J.C. Chapman | Improvement in machines for drawing bolts and spikes | nail extractors |
| 37,384 | Jan. 13, 1863 | J.C. Chapman | Boring and Squaring Off Cylinders | metalworking machine mechanisms |
| 42,560 | May 03, 1864 | J.C. Chapman | Ratchet Drill | ratchet drills |
| 50,748 | Oct. 31, 1865 | J.C. Chapman, D.C. Stillson | Improved Tool for Turning Gas-Pipe, etc. | pipe wrenches |
| 60,138 | Dec. 04, 1866 | J.C. Chapman | Lathe Chuck | metal lathe chucks |
| 63,992 | Apr. 23, 1867 | J.C. Chapman | Boring Tool | valve reseating tools |
| 94,241 | Aug. 31, 1869 | J.C. Chapman, A. Robes | Improvement in Pipe-Wrench and Pipe-Cutter | pipe wrenches |
| 150,395 | May 05, 1874 | J.C. Chapman | Slotting and Planing Tools | metal planers |
| 154,455 | Aug. 25, 1874 | W.H. Hoffman, J.C. Chapman | Improvement in self-oiling journal-boxes and hangers | industrial machine bearings |
| 157,373 | Dec. 01, 1874 | J.C. Chapman | Improvement in hand drilling-machines | drilling and boring |
