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| All Patents in class 172/550 | |||||
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| Number | Date | Patentee | Title | Type | |
| 250,726 | Dec. 13, 1881 | A. Guerdan | Cutterhead for stave-sawing machines | cutterheads | |
| 293,135 | Feb. 05, 1884 | E. Benjamin | Planer-knife | cutters | |
| 1,041,980 | Oct. 22, 1912 | A.J. Dremel | Rotary cultivator | cultivators and tillers | |
| 1,258,882 | Mar. 12, 1918 | A.J. Dremel | Soil-milling machine | cultivators and tillers | |