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| All Patents in class 81/57.2 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 68,787 | Sep. 10, 1867 | C.T. Poulton | Improved Brace for Boring, Wrenching, etc. | |
 | 137,910 | Apr. 15, 1873 | P.L. Gibbs | Improvement in Railroad Track Wrenches | |
 | 527,103 | Oct. 09, 1894 | J. Barrett | Tool For Handling Drill Bits Or Other Tools | |
 | 541,494 | Jun. 25, 1895 | J.M. Long, C.P. Nixholm | Wrench | |
| 807,481 | Dec. 19, 1905 | G.L. Miller | Tire Bolting, Boring and Drilling Machine | ||