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| Patents for John Stewart | |||||
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| Number | Date | Patentee | Title | Type | |
| 8,498X | Nov. 17, 1834 | J. Stewart | Thrashing machine and straw cutter | miller | |
| 252,537 | Jan. 17, 1882 | J. Stewart | Speed Gearing | industrial machine speed and direction changing mechanisms | |
| 647,685 | Apr. 17, 1900 | J. Stewart | Combined Pipe Wrench and Cutter | pipe wrenches | |