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| Patents for John L. Mason | |||||
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| Number | Date | Patentee | Title | Type | |
| 19,786 | Mar. 30, 1858 | J.L. Mason | Chuck for Making Sheet Metal Screws | metal lathe chucks | |
| 88,885 | Apr. 13, 1869 | J.L. Mason | Screw Forming Machine | metal swaging machines | |
| 131,695 | Sep. 24, 1872 | J.L. Mason | Improvement in Fruit-Jars | jar wrenches | |