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Patents for Percy B. Bosworth | |||||
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Picture | Number | Date | Patentee | Title | |
586,514 | Jul. 13, 1897 | P.B. Bosworth | Commutator Truing Device | ||
![]() | 660,618 | Oct. 30, 1900 | P.B. Bosworth | Device for truing commutators |