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| All Patents in class 307/132R | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,725 | Jul. 16, 1842 | S.K. Baldwin | Improvement in machines for cutting shoe-pegs | shoemaking | |
| 286,273 | Oct. 09, 1883 | P.B. Delany | Electrical Synchronous Movement | synchronous motors | |
| 2,325,249 | Jul. 27, 1943 | A.P. Jorgenson | Delayed action interrupter electric impulse apparatus | ||