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| Patents for Robert Thomas | |||||
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| Picture | Number | Date | Patentee | Title | |
| 3,109X | May 29, 1819 | R. Thomas | Tube auger | ||
 | 142,347 | Sep. 02, 1873 | J. Oliver | Preserving and Drying Lumber | |
 | 510,263 | Dec. 05, 1893 | E.P. Jones | Wrench | |