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| All Patents in class 56/306 | |||||
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| Number | Date | Patentee | Title | Type | |
| 79,537 | Jul. 07, 1868 | T. Alsop | Mill Gearing | grist mills | |
| 263,159 | Aug. 22, 1882 | A.O. Frick | Traction Engine | steam traction engines | |
| 459,325 | Sep. 08, 1891 | B.D. Whitney | Feed-roller | wood planers | |