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| Patents Granted on 1842-05-17 | |||||
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| Number | Date | Patentee | Title | Type | |
| RX-37 | May 17, 1842 | A.J. Murray | Improvement in Portable Presses for Pressing Tobacco, Cotton, Hay, etc. | tobacco machinery | |
| RE38 | May 17, 1842 | S. Merrick | Improvement in Screw Wrenches | nut wrenches | |
| RX-38 | May 17, 1842 | S. Merrick | Improvement in the Screw Wrenches | nut wrenches | |