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| Patents for Wills A. Burrowes | |||||
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| Number | Date | Patentee | Title | Type | |
| 952,320 | Mar. 15, 1910 | T.J. Fegley | North Bros. version of the Millers Falls "protected spring" design. | drill accessories | |
| 1,059,132 | Apr. 15, 1913 | G.O. Leopold, T.J. Fegley | Bit storage handle for the North Bros. (e.g. 1530 & 1431) eggbeater drills. | drill accessories | |
| 1,236,848 | Aug. 14, 1917 | G.O. Leopold | Alternate driving means for the North Bros. 1445 drill | hand drills | |