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| Patents for Joseph J. Demers | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,119,694 | Dec. 01, 1914 | K.A. Harvie | Wrench | wrench jaw components | |
| 1,282,037 | Oct. 22, 1918 | L.W. Bugbee | Grinding Machine | ||
| 1,430,955 | Oct. 03, 1922 | J.J. Demers | Wrench | wrench components | |