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| Patents for P. W. Gates & Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
| 5,103 | May 08, 1847 | P.W. Gates | Screw Cutting Die | ||
 | 22,802 | Feb. 01, 1859 | I.A. Hedges | Improvement in Mills for Grinding Cane, &c. | |
 | 27,863 | Apr. 10, 1860 | P.W. Gates | Cane Mill | |
| 196,082 | Oct. 16, 1877 | P.W. Gates | Ore Crusher | ||
| 315,271 | Apr. 07, 1885 | P.W. Gates | Combines Boring Bar and Centering Mandrel | ||