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| All Patents in class 172/134 | |||||
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| Number | Date | Patentee | Title | Type | |
| 84,910 | Dec. 15, 1868 | J. Heitzman, J. Schriblein | Improvement in Hand-Cultivators | cultivators and tillers | |
| 1,814,003 | Jul. 14, 1931 | H.O. Lown | Gang plow | plows | |