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| Patents for Jason L. Ewin | |||||
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| Number | Date | Patentee | Title | Type | |
| 132,804 | Nov. 05, 1872 | O.A. Haynes, E. Cliff | Improvement in Lathe Dogs | lathe dogs | |
| 159,962 | Feb. 16, 1875 | J. Powell | Lubricator for Steam Engines | oil cups | |
| 292,676 | Jan. 29, 1884 | J.R. Parsons | Jeweling Tool | watchmakers lathes | |