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Patents for Francis M. Walker | |||||
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Number | Date | Patentee | Title | Type | |
357,431 | Feb. 08, 1887 | F.M. Walker | Traction Engine Driving Gear | traction engine steering apparatus | |
379,996 | Mar. 27, 1888 | F.M. Walker, H.D. Smith | Traction Engine | traction engine propulsion components |