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| Patents for William Chrystal | |||||
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| Number | Date | Patentee | Title | Type | |
| 139,578 | Jun. 03, 1873 | G.M. Hinkley, A. Rodgers | Improvement in machines for moving logs | sawmill accessories | |
| 161,903 | Apr. 13, 1875 | A. Rodgers | Improvement in machines for moving logs | sawmill accessories | |