| All Patents in class 72/440 |
Patents 1 -
15
of 20
      |
| Number | Date | Patentee | Title | Type |
| 8,548 | Nov. 25, 1851 | M. Peck | Drop Hammer | drop hammers |
| 37,445 | Jan. 20, 1863 | W.C. Hicks | Improvement in drop-presses | stamping presses |
| 41,775 | Mar. 01, 1864 | B. Hotchkiss | Drop Hammer | drop hammers |
| 46,229 | Feb. 07, 1865 | F. Krautwadel, H.E. Fessel | Trip Hammer | trip and helve hammers |
| 68,295 | Aug. 27, 1867 | J. Tandler | Trip Hammer | trip and helve hammers |
| 132,173 | Oct. 15, 1872 | J. Neuberger | Improvements in Trip-Hammers | trip and helve hammers |
| 164,392 | Jun. 15, 1875 | F.A. Pratt | Improvement in drop-hammers | |
| RE7,788 | Jul. 10, 1877 | W.C. Hicks | Improvement in drop-presses | stamping presses |
| 310,969 | Jan. 20, 1885 | A. Williams | Drop-hammer lifter | drop hammers |
| 350,007 | Sep. 28, 1886 | F.M. Leavitt | Drop-hammer | drop hammers |
| 386,076 | Jul. 10, 1888 | F.M. Leavitt | Drop-hammer | drop hammers |
| 409,836 | Aug. 27, 1889 | E. Hammesfahr | Drop Hammer | drop hammers |
| 421,327 | Feb. 11, 1890 | N.C. Stiles | Drop-hammer | drop hammers |
| 454,824 | Jun. 23, 1891 | W. Jones | Power Hammer | power hammers |
| 463,259 | Nov. 17, 1891 | E.D. Estrada | Machine for Testing the Strengh of Metals | testing machines |
