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| All Patents in class 173/117 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 938,709 | Nov. 02, 1909 | G.H. Rowe | Electromechanical device | |
 | 973,216 | Oct. 18, 1910 | G.H. Rowe | Electromechanical device | |
 | 1,017,916 | Feb. 20, 1912 | G.H. Rowe | Power Hammer | |
 | 1,024,025 | Apr. 23, 1912 | G.H. Rowe | Percussion device | |
 | 1,024,026 | Apr. 23, 1912 | G.H. Rowe | Electromechanical device | |
 | 1,062,799 | May 27, 1913 | G.H. Rowe | Rock drill | |
 | 1,298,966 | Apr. 01, 1919 | J.S. Knowlson | Electrically-operated tool | |
| 3,054,464 | Sep. 18, 1962 | E.J. Ondeck | Electric Hammer | ||