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| Patents for J. A. Eastman | |||||
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| Number | Date | Patentee | Title | Type | |
| 57,966 | Sep. 11, 1866 | T.T. Prosser | Improvement in screws | ||
| 58,134 | Sep. 18, 1866 | T.T. Prosser | Improvement in machines for making screws | ||