| All Patents in class 72/443 |
Patents 1 -
15
of 18
      |
| Number | Date | Patentee | Title | Type |
| 35,309 | May 20, 1862 | W.D. Grimshaw | Power Hammer | power hammers |
| 45,850 | Jan. 10, 1865 | W.T. Nicholson | Improved Machine for Forging File Blanks | tool making machines |
| 208,719 | Oct. 08, 1878 | M. Deering | Improvement in power-hammers | trip and helve hammers |
| 240,881 | May 03, 1881 | C.M. Brown | Power-hammer | trip and helve hammers |
| 264,859 | Sep. 26, 1882 | J.C. Butterfield | Atmospheric hammer | drop hammers |
| 301,937 | Jul. 15, 1884 | T. Tripp, Jr. | Trip-hammer | trip and helve hammers |
| 341,045 | May 04, 1886 | T.V. Norris | Power Hammer | power hammers |
| 487,692 | Dec. 06, 1892 | A. Beaudry | Power-hammer | drop hammers |
| 656,135 | Aug. 14, 1900 | H.H. Hamlett | Hammer Press | forging presses |
| 743,763 | Nov. 10, 1903 | W.E. Sheehy | Power Hammer | power hammers |
| 1,007,792 | Nov. 07, 1911 | F. Orton | Press | stamping presses |
| 1,035,968 | Aug. 20, 1912 | J.L. Kelley | Trip Hammer | trip and helve hammers |
| 1,046,809 | Dec. 10, 1912 | J. Kunz | Mechanical Hammer | power hammers |
| 1,620,534 | Mar. 08, 1927 | C.R. Gabriel | Press | punch presses |
| 2,612,868 | Oct. 07, 1952 | R.P. Fitzgerald | Pneumatic drop hammer | drop hammers |
