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| Patents for Alfred J. Signor | |||||
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| Number | Date | Patentee | Title | Type | |
| 256,448 | Apr. 11, 1882 | A.J. Signor | Die Stock | tap wrenches and die stocks | |
| 538,132 | Apr. 23, 1895 | A.J. Signor | Electrical Igniting Device for Gas Engines | ignition systems | |
| 662,155 | Nov. 20, 1900 | A.J. Signor | Multiple Cylinder Explosive Engine | internal combustion engines | |
| 662,315 | Nov. 20, 1900 | A.J. Signor | Sparking Igniter for Explosive-Engines | ignition systems | |