| All Patents in class 72/436 |
Patents 1 -
10
of 55
      |
| Picture | Number | Date | Patentee | Title |
 | 8,115 | May 27, 1851 | H. Waterman | Machinery for hardening and straightening saws, &c. |
| | 8,548 | Nov. 25, 1851 | M. Peck | Drop Hammer |
 | 37,445 | Jan. 20, 1863 | W.C. Hicks | Improvement in drop-presses |
| | 41,775 | Mar. 01, 1864 | B. Hotchkiss | Drop Hammer |
| | 42,581 | May 03, 1864 | B. Hotchkiss | Power Hammer |
| | 58,880 | Oct. 16, 1866 | J.P. Noyes | Drop Hammer |
| | 130,183 | Aug. 06, 1872 | J. Blackadder | Improvement in Drop-Hammers |
 | 132,173 | Oct. 15, 1872 | J. Neuberger | Improvements in Trip-Hammers |
| | 142,723 | Sep. 09, 1873 | C. Peck | Drop Hammer Lifters |
| | 161,954 | Apr. 13, 1875 | H. Hammond | Drop Hammer |
