| All Patents in class 173/126 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 156,276 | Oct. 27, 1874 | J.C. Butterfield | Improvement in power-hammers | drop hammers |
| 639,538 | Dec. 19, 1899 | H.G. Dittbenner | Power-hammer | drop hammers |
| RE12,990 | Jul. 13, 1909 | J. Pryke, J.T. Rawsthorne | Pantograph Engraving Machine | metal engraving machines |
| 1,356,297 | Oct. 19, 1920 | A.T. Lochner | Power-hammer | |
| 1,889,441 | Nov. 29, 1932 | J.F. Haas | Combined rotary and reciprocatory drill | handheld power drills |
| 2,455,577 | Dec. 07, 1948 | E.F. Hager | Center punch | center punches |
| 3,022,838 | Feb. 27, 1962 | W.F. Mitchell | Portable hammer | |
