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| All Patents in class 144/340 | |||||
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| Number | Date | Patentee | Title | Type | |
| 72,873 | Dec. 31, 1867 | J. Maitre | Improved mode of separating bark from wood | bark processing machines | |
| 4,653,561 | Mar. 31, 1987 | M. Payeur | Log debarking machine | debarking machines | |