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| Patents for Amos K. Ersland | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,713,038 | May 14, 1929 | A.K. Ersland | Wrench | quick adjust wrenches | |
| 1,752,425 | Apr. 01, 1930 | A.K. Ersland | Wrench | pliers type wrenches | |
| 1,872,710 | Aug. 23, 1932 | A.K. Ersland | Wrench | quick adjust wrenches | |