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| Patents Granted on 1851-05-27 | |||||
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| Number | Date | Patentee | Title | Type | |
| 8,113 | May 27, 1851 | G.W. Putnam | Vise-jaw for saw-filing machinery | saw sharpening machines | |
| 8,115 | May 27, 1851 | H. Waterman | Machinery for hardening and straightening saws, &c. | making sawblades | |
| 8,125 | May 27, 1851 | N. Barlow | Planing-machine | wood planers | |