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| Patents for P. Blaisdell & Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 66,672 | Jul. 16, 1867 | P. Blaisdell | Improvement in upright drills | drill presses | |
| 426,588 | Apr. 29, 1890 | S.E. Hildreth | Upright drill | drill presses | |
| 432,179 | Jul. 15, 1890 | E.S. Capen | Friction-clutch | industrial machine clutches | |
| 637,769 | Nov. 28, 1899 | E. Earle | Compound rest for engine-lathes, &c. | metal lathes | |
| 758,628 | May 03, 1904 | E. Earle | Engine-lathe | metal lathes | |