| All Patents in class 72/438 |
Patents 31 -
45
of 62
      |
| Number | Date | Patentee | Title | Type |
| 462,775 | Nov. 10, 1891 | W.H. Potter | Hoop Riveting Machine | riveting machines |
| 523,050 | Jul. 17, 1894 | L.A. Parrock | Machine for Forging or Hammering Metal | drop hammers |
| 579,356 | Mar. 23, 1897 | E.H. Whitlock | Drop Hammer | drop hammers |
| 588,422 | Aug. 17, 1897 | C. Grüber | Mechanical or Drop Hammer | drop hammers |
| 600,201 | Mar. 08, 1898 | J. Jacks | Oliver | power hammers |
| 632,265 | Sep. 05, 1899 | J. Horton | Drop Hammer | drop hammers |
| 651,754 | Jun. 12, 1900 | H. Guyot | Double Stamp Hammer | drop hammers |
| 656,135 | Aug. 14, 1900 | H.H. Hamlett | Hammer Press | forging presses |
| 690,320 | Dec. 31, 1901 | D. Robertson | Machine for Hammering or Tapering Piston Rings | metal swaging machines |
| 706,151 | Aug. 05, 1902 | W. Bauermeister | Power Hammer | power hammers |
| 717,289 | Dec. 30, 1902 | J.M. Schroder, A.M. Schroder, B.C. Schroder | Tilt Hammer | power hammers |
| 921,736 | May 18, 1909 | J. Pryke, J. Tweedale | Pantograph Engraving Machine | metal engraving machines |
| RE12,990 | Jul. 13, 1909 | J. Pryke, J.T. Rawsthorne | Pantograph Engraving Machine | metal engraving machines |
| 942,756 | Dec. 07, 1909 | W. Norris, T. Scott-King | Power Hammer | power hammers |
| 995,742 | Jun. 20, 1911 | A. Walle | Foot Powered Hammer | foot operated hammers |
