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| Patents for Henry Alexander | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,866X | Jan. 14, 1813 | H. Alexander | Preparing colors and paints from ores | ||
| 2,016X | Oct. 27, 1813 | H. Alexander | Grinding and reducing ores into powder and preparing them for various uses | ||
 | 508,591 | Nov. 14, 1893 | H. Alexander | Pipe Tongs | |