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| Patents for J. A. Jeffers | |||||
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| Number | Date | Patentee | Title | Type | |
| 778,379 | Dec. 27, 1904 | A.O. Slentz | Turn-table | vehicle mechanic | |
| 806,349 | Dec. 05, 1905 | C.H. Knight | Sawmill set-works | sawmill set works | |
| 878,673 | Feb. 11, 1908 | D.E. Rowland | Wrench | alligator wrenches | |