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| Patents for John C. Speirs | |||||
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| Number | Date | Patentee | Title | Type | |
| 459,218 | Sep. 08, 1891 | R.T. Torkelson | Forging Wrench Handles | wrench handle components | |
| 536,301 | Mar. 26, 1895 | J.C. Speirs | Method of Making Wrenches | wrench handle components | |
| 639,785 | Dec. 26, 1899 | J.C. Speirs | Pipe Wrench | pipe wrenches | |