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| Patents for L. Stewart | |||||
| Number | Date | Patentee | Title | Type | |
| 27,588 | Mar. 20, 1860 | G. Westinghouse, Sr. | Improvement in crank-boxes | ||
| 27,941 | Apr. 17, 1860 | G. Westinghouse, Sr. | Grain-separator | corn and grain separators | |