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| Patents for Henry Simpson | |||||
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| Number | Date | Patentee | Title | Type | |
| 10,946 | May 23, 1854 | C. Tyler, P. Teal | Lathe for Turning the Interior Surface of Hollow Ware | metal lathes | |
| 441,733 | Dec. 02, 1890 | E.L. Wyckoff, A. Wyckoff | Composite tubing | ||