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| All Patents in class 411/406 | |||||
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| Number | Date | Patentee | Title | Type | |
| 38,141 | Apr. 14, 1863 | J.A. Ayres | Improvement in Screws | screws | |
| 306,492 | Oct. 14, 1884 | G.W. Jackman | Improvement in Screws | screws | |
| 748,241 | Dec. 29, 1903 | E.L. Walter | Screw and Driver Therefor | screwdriver blades | |