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| Patents Granted on 1864-05-10 | |||||
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| Number | Date | Patentee | Title | Type | |
| 42,639 | May 10, 1864 | C.L. Campbell | Hollow Auger | wheelwright | |
| 42,647 | May 10, 1864 | W.W. Draper | Tool holder | tool handles | |
| 42,691 | May 10, 1864 | A. Schwitter | Improvement in rose-engines | ornamental lathes | |
| 42,695 | May 10, 1864 | F. Shenton | Improvement in machines for making slate and other frames | specialty woodworking machines | |