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| All Patents in class 172/103 | |||||
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| Number | Date | Patentee | Title | Type | |
| 236,771 | Jan. 18, 1881 | E. Brown | Steam Plow | steam plows | |
| 1,258,882 | Mar. 12, 1918 | A.J. Dremel | Soil-milling machine | cultivators and tillers | |