| All Patents in class 72/431 |
Patents 1 -
15
of 51
      |
| Number | Date | Patentee | Title | Type |
| 52,447 | Feb. 06, 1866 | A. Rix | Forging Apparatus | drop hammers |
| 108,326 | Oct. 18, 1870 | J.C. Butterfield, J. Hay | Improvement in trip-hammers | drop hammers |
| RE4,470 | Jul. 18, 1871 | J.C. Butterfield, J. Hay | Improvement in trip-hammers | drop hammers |
| 136,253 | Feb. 25, 1873 | J.M. Long | Power Hammers | drop hammers |
| 144,638 | Nov. 18, 1873 | G. Stacy | Revolving Hammers | power hammers |
| 156,276 | Oct. 27, 1874 | J.C. Butterfield | Improvement in power-hammers | drop hammers |
| 157,695 | Dec. 15, 1874 | J.A. Nichols, J.L. Piper | Metal-Riveting Machines | riveting machines |
| 166,703 | Aug. 17, 1875 | W.J. Clark, W.H. Clark, A.O. Kittredge | Mallets for Smoothing Sheet Metal | drop hammers |
| 208,719 | Oct. 08, 1878 | M. Deering | Improvement in power-hammers | trip and helve hammers |
| 225,238 | Mar. 09, 1880 | C.D. Rodgers | Machine for Hammering Draw Plates | metal swaging machines |
| 237,872 | Feb. 15, 1881 | W.R. Jenkins, Jr. | Power Hammer | power hammers |
| 281,001 | Jul. 10, 1883 | A. Beaudry | Power-hammer | drop hammers |
| 285,387 | Sep. 25, 1883 | J.C. Butterfield | Power Hammer | power hammers |
| 312,826 | Feb. 24, 1885 | M. Deering | Power-hammer | trip and helve hammers |
| 322,930 | Jul. 28, 1885 | H. Hammond | Forging Hammer | power hammers |
