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| All Patents in class 81/448 | |||||
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| Number | Date | Patentee | Title | Type | |
| 39,206 | Jul. 14, 1863 | J.A. Ayres | Improved Screwdriver | screwdriver blades | |
| 306,491 | Oct. 14, 1884 | G.W. Jackman | Screw holding screwdriver | screwdriver blades | |
| 518,472 | Apr. 17, 1894 | S.I. Snyder | Screw Driver | screwdriver blades | |
| 532,830 | Jan. 22, 1895 | S.I. Snyder | Screw-Driver | screwdriver blades | |
| 821,328 | May 22, 1906 | H.D. Bartlett | Hand-Operated Tool | screwdriver handles | |