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| All Patents in class 173/84 | |||||
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| Number | Date | Patentee | Title | Type | |
| 175,169 | Mar. 21, 1876 | H.F. Roehrs, J. Kohler | Pile-Drivers | pile drivers | |
| 370,952 | Oct. 04, 1887 | F.M. Leavitt | Drop-hammer | drop hammers | |