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| Patents for Edwin J. Armstrong | |||||
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| Number | Date | Patentee | Title | Type | |
| 370,303 | Sep. 20, 1887 | E.J. Armstrong | Governor for Steam Engines | steam engine governors | |
| 372,102 | Oct. 25, 1887 | E.J. Armstrong | Cross Head for Steam Engines | steam engines | |
| CA-57,919 | Oct. 26, 1897 | E.J. Armstrong | Gouverneur Pour Machines A Vapeur | steam engine governors | |
| 1,432,011 | Oct. 17, 1922 | E.J. Armstrong | Slot Cutting Machine | wrench handle components | |