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| Patents for H. H. Evarts | |||||
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| Number | Date | Patentee | Title | Type | |
| 24,079 | May 17, 1859 | H.H. Evarts | Machine for sawing staves from the bolt | cooper | |
| 57,966 | Sep. 11, 1866 | T.T. Prosser | Improvement in screws | ||