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| All Patents in class 172/482 | |||||
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| Number | Date | Patentee | Title | Type | |
| 348,208 | Aug. 31, 1886 | W.A. Dromgold, S.N. Hench | Cultivator | cultivators and tillers | |
| 1,851,142 | Mar. 29, 1932 | H.E. Welbourne | Implement hitch | ||