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| All Patents in class 74/89.31 | |||||
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| Number | Date | Patentee | Title | Type | |
| 434,576 | Aug. 19, 1890 | H.B. Wyman | Drilling Machine | stone boring and drilling machines | |
| 534,180 | Feb. 12, 1895 | C.E. Martin, A.J. Smart | Drilling-machine | drill presses | |