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| Patents for John J. O'Leary | |||||
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| Number | Date | Patentee | Title | Type | |
| 141,736 | Aug. 12, 1873 | E. Tarrant | Improvement in log-turners | sawmill log handling | |
| 141,739 | Aug. 12, 1873 | J. Torrent | Improvement in log-turners | sawmill log handling | |