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| Patents for Hattie L. Walker | |||||
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| Number | Date | Patentee | Title | Type | |
| 225,702 | Mar. 23, 1880 | C. Hammelmann | Mechanical movement | blacksmith | |
| 231,331 | Aug. 17, 1880 | F. Kraengel | Adjustable Frog for Plane Cutter Adjustments | plane throat adjustments | |