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| Patents for Percy B. Bosworth | |||||
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| Number | Date | Patentee | Title | Type | |
| 586,514 | Jul. 13, 1897 | P.B. Bosworth | Commutator Truing Device | commutator dressing machines | |
| 660,618 | Oct. 30, 1900 | P.B. Bosworth | Device for truing commutators | commutator dressing machines | |