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| Patents for Nathan Washburn | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,269 | Apr. 03, 1849 | N. Washburn, C. Hart | Cast-iron car-wheel | railroad car wheels | |
| 23,414 | Mar. 29, 1859 | N. Washburn | Rolling Wheel Tires | metal rolling machines | |