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| Patents for Newton W. Holt | |||||
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| Number | Date | Patentee | Title | Type | |
| 159,180 | Jan. 26, 1875 | N.W. Holt | Jewelers Lathe | jewelers lathes | |
| 399,406 | Mar. 12, 1889 | N.W. Holt | Dentists Lathe | dental apparatus | |