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