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| All Patents in class 51/300 | |||||
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| Number | Date | Patentee | Title | Type | |
| 81,520 | Aug. 25, 1868 | J.C. McAfee | Plane with an Abrasive Medium | planes | |
| 163,880 | Jun. 01, 1875 | S.G. Morrison | Improvement in modes of applying emery to metal surfaces | grinding wheels | |
| 465,376 | Dec. 15, 1891 | A. Johnston | Means for Grinding Cutlery or Other Articles | sharpening apparatus | |