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| Patents for William Sperry | |||||
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| Number | Date | Patentee | Title | Type | |
| 6,053X | Jun. 29, 1830 | W. Sperry, A. Slover | Thrashing machine | threshers and thrashers | |
| 6,166X | Oct. 01, 1830 | W. Sperry | Thrashing machine | threshers and thrashers | |