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| Patents for Levi W. Stockwell | |||||
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| Picture | Number | Date | Patentee | Title | |
| 123,951 | Feb. 20, 1872 | L.W. Stockwell | Improvement in Screw Cutting Machines | ||
| 250,459 | Dec. 06, 1881 | L.W. Stockwell | Machine for Threading Bolts | ||
| 259,433 | Jun. 13, 1882 | L.W. Stockwell | Screw Threading Machine | ||
| 292,382 | Jan. 22, 1884 | L.W. Stockwell | Regulator for Electric Motors | ||