| All Patents in class 72/446 |
Patents 1 -
15
of 36
      |
| Number | Date | Patentee | Title | Type |
| RE2,389 | Nov. 06, 1866 | B. Hotchkiss | Trip Hammer | trip and helve hammers |
| 157,695 | Dec. 15, 1874 | J.A. Nichols, J.L. Piper | Metal-Riveting Machines | riveting machines |
| 217,725 | Jul. 22, 1879 | E.W. Bliss | Improvement in machinery for shaping sheet metal | stamping presses |
| RE10,324 | May 08, 1883 | N.C. Stiles | Drop-hammer | drop hammers |
| 302,520 | Jul. 22, 1884 | I.L. Penney | Trip Hammer | drop hammers |
| 327,999 | Oct. 13, 1885 | C.M. Brown | Power-hammer | trip and helve hammers |
| 357,255 | Feb. 08, 1887 | E. Welsh, A. Welsh | Oliver | foot operated hammers |
| 364,142 | May 31, 1887 | N.C. Stiles | Power-press | stamping presses |
| 379,818 | Mar. 20, 1888 | C.J. Rundquist | Foot-power hammer | foot operated hammers |
| 417,201 | Dec. 10, 1889 | M. Redlinger | Foot-power hammer | foot operated hammers |
| 435,264 | Aug. 26, 1890 | C.J. Van Depoele | Reciprocating Electric Hammer | drop hammers |
| 463,259 | Nov. 17, 1891 | E.D. Estrada | Machine for Testing the Strengh of Metals | testing machines |
| 493,874 | Mar. 21, 1893 | J. O'Brien | Power Hammer | power hammers |
| 497,013 | May 09, 1893 | C.M. Brown | Power-hammer | drop hammers |
| 520,876 | Jun. 05, 1894 | M.H. Brown | Rail or Bar Bender | metal bending machines |
