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| Patents for James Hart | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,768X | Sep. 17, 1833 | J. Hart, W.V. Holladay | Cylinder and concave thrashing machine | threshers and thrashers | |
| 137,839 | Apr. 15, 1873 | J. Hart | Coffee Roasters | coffee roasters | |
| 144,788 | Nov. 18, 1873 | W. Hopkins, G.G. Picking | Steam-Cylinders and Piston-Valves | ||