| All Patents in class 173/75 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 10,276 | Nov. 29, 1853 | R.R. Taylor | Arrangement of valves, ports, and passages for operating steam-hammers | steam hammers |
| 45,896 | Jan. 10, 1865 | W.D. Grimshaw | Atmospheric Hammer | power hammers |
| 1,282,928 | Oct. 29, 1918 | R.S. Peirce | Drill | |
| 1,285,712 | Nov. 26, 1918 | H.R. Hughes | Horizontal Drilling Machine | |
| 1,423,511 | Jul. 25, 1922 | J.N. Baker | Routing tool | handheld routers |
| 1,803,307 | Apr. 28, 1931 | O.P. Wodack | Portable electric tool | handheld power drills |
| 2,452,268 | Oct. 26, 1948 | R. Schümann | Motor Hand Tool Assembly | handheld grinders |
