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| All Patents in class 172/545 | |||||
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| Number | Date | Patentee | Title | Type | |
| 8,039X | Mar. 01, 1834 | B.F. Stickney | Agricultural pulverizer | plows | |
| 1,585,944 | May 25, 1926 | G.T. Strite | Self-cleaning hoe | ||