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| Patents for Henry Underwood | |||||
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| Number | Date | Patentee | Title | Type | |
| 19,318 | Feb. 09, 1858 | H. Underwood | Lap-joint for belting | industrial machine mechanisms | |
| 27,846 | Apr. 10, 1860 | H. Underwood | Belting | industrial machine mechanisms | |
| RE2,433 | Jan. 01, 1867 | H. Underwood | Improved lap-joint | industrial machine mechanisms | |