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| Patents for Jere C. Dufresne | |||||
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| Number | Date | Patentee | Title | Type | |
| 738,015 | Sep. 01, 1903 | J.C. Dufresne | Adjustable Spanner Wrench | quick adjust wrenches | |
| 1,252,253 | Jan. 01, 1918 | J.C. Dufresne | Chuck | ||