| All Patents in class 72/441 |
Patents 1 -
15
of 57
      |
| Number | Date | Patentee | Title | Type |
| 24,428 | Jun. 14, 1859 | B. Hotchkiss | Trip Hammer | trip hammers |
| 30,343 | Oct. 09, 1860 | E. Paye | Power Hammer | trip hammers |
| 39,924 | Sep. 15, 1863 | B. Hotchkiss | Improved Atmosheric Trip-Hammer | steam hammers |
| 62,407 | Feb. 26, 1867 | A.J. Grainger | Improved Forging Apparatus | power hammers |
| 88,980 | Apr. 13, 1869 | T.T. Prosser | Improved power-hammer | drop hammers |
| 136,253 | Feb. 25, 1873 | J.M. Long | Power Hammers | drop hammers |
| 144,969 | Nov. 25, 1873 | W. Evans | Machines for Forging Hammers | tool making machines |
| 170,868 | Dec. 07, 1875 | C. Lusted | Drop-Hammer | drop hammers |
| 206,665 | Aug. 06, 1878 | C.W. Corr | Power Hammer | drop hammers |
| 244,370 | Jul. 19, 1881 | A. Beaudry | Power-hammer | drop hammers |
| 281,001 | Jul. 10, 1883 | A. Beaudry | Power-hammer | drop hammers |
| 335,394 | Feb. 02, 1886 | H. St. Lawrence | Power Hammer | power hammers |
| 379,818 | Mar. 20, 1888 | C.J. Rundquist | Foot-power hammer | foot operated hammers |
| 385,018 | Jun. 26, 1888 | W.B. Wiswall, H. Stewart | Spring-hammer for blacksmiths | foot operated hammers |
| 477,559 | Jun. 21, 1892 | W.H. Law | Power Hammer | power hammers |
