| All Patents in class 72/438 |
Patents 16 -
30
of 62
      |
| Number | Date | Patentee | Title | Type |
| 78,291 | May 26, 1868 | T.P. Keeler | Drop Hammer | drop hammers |
| 117,432 | Jul. 25, 1871 | J. Krehbiel | Trip Hammer | trip and helve hammers |
| 118,316 | Aug. 22, 1871 | L.L. Whitlock | Imprvement in Machines for Lifting Drop Weights | drop hammers |
| 127,853 | Jun. 11, 1872 | J.E. Crisp | Improement in Drop-Hammer | drop hammers |
| 132,173 | Oct. 15, 1872 | J. Neuberger | Improvements in Trip-Hammers | trip and helve hammers |
| 145,601 | Dec. 16, 1873 | J. Tobin | Drop-Hammers | drop hammers |
| 161,954 | Apr. 13, 1875 | H. Hammond | Drop Hammer | drop hammers |
| 172,246 | Jan. 18, 1876 | L. Chapman | Metal Hammering-Machine | power hammers |
| 243,986 | Jul. 05, 1881 | S. Shetter | Trip Hammer | trip and helve hammers |
| 302,811 | Jul. 29, 1884 | J.R. Abbe | Trip-hammer | trip and helve hammers |
| 343,540 | Jun. 08, 1886 | A.O. Kittredge, F.M. Leavitt | Malleting Machine | power hammers |
| 394,483 | Dec. 11, 1888 | G. Glossop | Pneumatic hammer | drop hammers |
| 409,836 | Aug. 27, 1889 | E. Hammesfahr | Drop Hammer | drop hammers |
| 414,687 | Nov. 12, 1889 | H.W. Dopp, deceased (Estate of), M.J. Stark, Executor, W.H. Dopp, Executor, II | Steam Stamping Press | steam hammers |
| 459,092 | Sep. 08, 1891 | C.A. Vaughn | Power-hammer | power hammers |
