| All Patents in class 72/466.9 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| RE4,470 | Jul. 18, 1871 | J.C. Butterfield, J. Hay | Improvement in trip-hammers | drop hammers |
| 138,617 | May 06, 1873 | H.M. Crippen | Swaging Machines | metal swaging machines |
| 173,510 | Feb. 15, 1876 | E.J. Soligny | Machine for Embossing and Chasing Metal | embossing and knurling machines |
| 429,807 | Jun. 10, 1890 | P.D. Dupont | Power-hammer spring | drop hammers |
| 454,824 | Jun. 23, 1891 | W. Jones | Power Hammer | power hammers |
| 1,042,961 | Oct. 29, 1912 | E.M. Patten | Trip Hammer | trip and helve hammers |
