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| Patents for James Armstrong | |||||
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| Picture | Number | Date | Patentee | Title | |
| 4,963 | Feb. 09, 1847 | H. Herring, J. Armstrong | Water Wheel | ||
| 79,540 | Jul. 07, 1868 | J. Armstrong | Rotary Harrow | ||
| 525,613 | Sep. 04, 1894 | W. Nier | Stave-cutting machine | ||
 | 535,440 | Mar. 12, 1895 | J. Armstrong | Tool Holder | |
 | 636,741 | Nov. 14, 1899 | J. Armstrong | Tool-holder | |
| 675,184 | May 28, 1901 | J. Armstrong | Tool Holder | ||
| 960,769 | Jun. 07, 1910 | J. Armstrong | Nurling Tool | ||
| 1,214,497 | Feb. 06, 1917 | J. Armstrong | Tool Holder | ||
| 1,214,498 | Feb. 06, 1917 | J. Armstrong | Tool Holder | ||