| All Patents in class 173/99 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 52,447 | Feb. 06, 1866 | A. Rix | Forging Apparatus | drop hammers |
| 655,028 | Jul. 31, 1900 | W. Sneller | Rotary Draw Block Hammer | rotary hammers |
| 809,348 | Jan. 09, 1906 | M.T. Weston | Power Hammer | rotary hammers |
| 1,024,025 | Apr. 23, 1912 | G.H. Rowe | Percussion device | impact chisels and drills |
| 1,082,880 | Dec. 30, 1913 | J.S. Knowlson | Mechanical hammer | miner |
| 1,124,393 | Jan. 12, 1915 | G.H. Coates | Hammer powered by flexible shaft | handheld power tools |
| 1,725,212 | Aug. 20, 1929 | F. Schneider | Power hammer | |
| 2,271,933 | Feb. 03, 1942 | G.D. Behlen | Power hammer | handheld power tools |
