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| All Patents in class 173/122 | |||||
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| Number | Date | Patentee | Title | Type | |
| 39,924 | Sep. 15, 1863 | B. Hotchkiss | Improved Atmosheric Trip-Hammer | steam hammers | |
| 58,880 | Oct. 16, 1866 | J.P. Noyes | Drop Hammer | drop hammers | |
| 639,538 | Dec. 19, 1899 | H.G. Dittbenner | Power-hammer | drop hammers | |
| 716,019 | Dec. 16, 1902 | H. Feldhus | Power Hammer | trip and helve hammers | |
| 973,216 | Oct. 18, 1910 | G.H. Rowe | Electromechanical device | impact riveters | |
| 1,052,823 | Feb. 11, 1913 | A.M. Irvine | Power Actuated Hand Tool | riveting tools | |