| Patents for M. W. Frothingham |
Patents 16 -
30
of 34
      |
| Number | Date | Patentee | Title | Type |
| 127,842 | Jun. 11, 1872 | J. Brooks | Improvements in Bench-Planes | bench planes |
| 128,287 | Jun. 25, 1872 | R. Crooker | Improvement in machines for straightening rolled-metal plates | metal straightening machines |
| 132,819 | Nov. 05, 1872 | D.E. Eaton | Improvement in Pipe-Wrenches | pipe wrenches |
| 133,483 | Nov. 26, 1872 | C.F. Putnam, Administrator, S.W. Putnam, Estate of (deceased) | Lathes for Turning Metal | metal lathes |
| 134,548 | Jan. 07, 1873 | J.C. Hoadley | Check-Valves | steam check valves |
| 138,453 | Apr. 29, 1873 | C.J. Ulmer | Improvement in gages for circular saws | lath making machines |
| RE5,463 | Jun. 24, 1873 | G.A. Walker | Improvement in paper-cutting machines | paper cutting machines |
| 141,300 | Jul. 29, 1873 | A. Weed | Improvement in file-cutting machines | file cutting machines |
| 141,767 | Aug. 12, 1873 | M.G. Crane | Improved Screw-Wrench | screw adjust wrenches |
| 142,460 | Sep. 02, 1873 | W.H. Gray | Improvement in planing-machines | wood planers |
| 144,178 | Oct. 28, 1873 | C.V. Woerd | Watchmakers' Lathes | watchmakers lathes |
| 144,588 | Nov. 11, 1873 | S.A. Woods | Improvement in planing-machines | wood planers |
| 145,900 | Dec. 23, 1873 | G.L. Roberts | Pegging Machines | cobbler |
| 146,500 | Jan. 13, 1874 | S.A. Woods | Pressure-roll and chip-breaker for planer | wood planers |
| 151,675 | Jun. 02, 1874 | W.H. Gray, S.A. Woods | Improvement in planing-machines | wood planers |
