| Patents Granted on 1857-03-31 |
Patents 1 -
15
of 15
      |
| Number | Date | Patentee | Title | Type |
| AI161 | Mar. 31, 1857 | F.D. Newbury | Breech-loading firearm | |
| RE444 | Mar. 31, 1857 | J.A. Woodbury | Planing machine | wood planers |
| 16,911 | Mar. 31, 1857 | E. Edwards | Rotary shingle-machine | shingle machines |
| 16,917 | Mar. 31, 1857 | W.P. Haskell, A. Haskell | Machine for manufacturing shoe-lasts | last making machines |
| 16,919 | Mar. 31, 1857 | J.S. Hall | Steam Carriage | steam carriages |
| 16,923 | Mar. 31, 1857 | J. Humphrey | Machine for cutting slots in clothes-pins | clothespin machines |
| 16,924 | Mar. 31, 1857 | A.R. Hurst | Machine for Husking Corn | corn huskers |
| 16,931 | Mar. 31, 1857 | A.C. Moore | Method of securing bits in their stocks | brace chucks |
| 16,932 | Mar. 31, 1857 | A. Moore | Method of centering and holding hubs while being bored | drilling and boring |
| 16,933 | Mar. 31, 1857 | J.E. Morgan | Improvement in Harrows | harrows |
| 16,936 | Mar. 31, 1857 | W.D. Sloan | Automatic lathe for turning irregular forms | pattern lathes |
| 16,937 | Mar. 31, 1857 | D.B. Spencer | Steam Plow | steam plows |
| 16,938 | Mar. 31, 1857 | A.W. Streeter | Method of constructing bit-stocks | braces |
| 16,940 | Mar. 31, 1857 | E.P. Morgan, S.J. Wethrell | Shaping Engine | metal shapers |
| 16,954 | Mar. 31, 1857 | H.S. Dewey | Machine for cutting the throats of carpenters' plane-stocks | tool making machines |
