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| Patents for Ira E. Stump | |||||
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| Number | Date | Patentee | Title | Type | |
| 722,332 | Mar. 10, 1903 | I.E. Stump | Bit-stock | spiral screwdrivers | |
| 1,259,926 | Mar. 19, 1918 | I.E. Stump | Mechanical movement | spiral screwdrivers | |