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| Patents for William Hay | |||||
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| Number | Date | Patentee | Title | Type | |
| 38,379 | May 05, 1863 | A.B. Farquhar, W.W. Dingee | Thrashing Machine | threshers and thrashers | |
| 65,744 | Jun. 11, 1867 | W. Hay | Improvement in Scale-Rules | rule graduations | |