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| Patents for Parritt Blaisdell | |||||
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| Number | Date | Patentee | Title | Type | |
| 66,672 | Jul. 16, 1867 | P. Blaisdell | Improvement in upright drills | drill presses | |
| 135,313 | Jan. 28, 1873 | P. Blaisdell | Improvement in drilling-machines | drill presses | |