| All Patents in class 72/443 |
Patents 1 -
10
of 18
      |
| Picture | Number | Date | Patentee | Title |
| | 35,309 | May 20, 1862 | W.D. Grimshaw | Power Hammer |
 | 45,850 | Jan. 10, 1865 | W.T. Nicholson | Improved Machine for Forging File Blanks |
 | 208,719 | Oct. 08, 1878 | M. Deering | Improvement in power-hammers |
 | 240,881 | May 03, 1881 | C.M. Brown | Power-hammer |
| | 264,859 | Sep. 26, 1882 | J.C. Butterfield | Atmospheric hammer |
 | 301,937 | Jul. 15, 1884 | T. Tripp, Jr. | Trip-hammer |
| | 341,045 | May 04, 1886 | T.V. Norris | Power Hammer |
 | 487,692 | Dec. 06, 1892 | A. Beaudry | Power-hammer |
| | 656,135 | Aug. 14, 1900 | H.H. Hamlett | Hammer Press |
| | 743,763 | Nov. 10, 1903 | W.E. Sheehy | Power Hammer |
