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| Patents for Sigourney Tool Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 317,886 | May 12, 1885 | T.H. Thompson | Drilling-machine | drill presses | |
| 1,322,543 | Nov. 25, 1919 | E.W. Clark | Bench-drill | drill presses | |