| Patents Granted on 1857-04-?? |
Patents 1 -
15
of 34
      |
| Number | Date | Patentee | Title | Type |
| RE447 | Apr. 07, 1857 | S.R. Wilmot | Improved portable steam crosscut-sawing machine | drag saws |
| XC-721 | Apr. 07, 1857 | D.T. Curtis | New method of clamping frames, &c., by the double action eccentric lever clamp | miter and corner clamps |
| 16,964 | Apr. 07, 1857 | J.L. Brown | Shingle-machine | shingle machines |
| 16,980 | Apr. 07, 1857 | I. Kepler | Smut-Machine | smut mills |
| 16,997 | Apr. 07, 1857 | E. Ripley | Improved Adjustable Pincer-Wrench | wrench combination tools |
| 17,001 | Apr. 07, 1857 | M.S. Richardson, E. Hanson, H.S. Smith | Machine for manufacturing cylindrical boxes | box making machines |
| 17,014 | Apr. 07, 1857 | S. Sawyer, J. Sawyer | Machine for splitting hoop poles | wood splitting machines |
| GB-185,700,987 | Apr. 08, 1857 | J.B. Sparke, A. Sparke | Improvement in Sawing Machinery | circular saws |
| RE448 | Apr. 14, 1857 | J. Bryant | Improved Carpenter's Gage | marking gauges |
| 17,017 | Apr. 14, 1857 | J. Bosenbury | Boring-machine | portable timber mortisers |
| 17,023 | Apr. 14, 1857 | T.A. Chandler | Pendulum Level or Inclinometer | inclinometers |
| 17,026 | Apr. 14, 1857 | J. Creager | Machine for sawing shingles | shingle machines |
| 17,038 | Apr. 14, 1857 | A. Hall | Expansive bit | adjustable drill bits |
| 17,061 | Apr. 14, 1857 | W.L. Williams | Machine for splitting wood | firewood machines |
| NF-16 | Apr. 20, 1857 | C.N. Nixon | Method of attaching rudders to floating vessels | boats and ships |
