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| All Patents in class 56/298 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,274,659 | Aug. 06, 1918 | J.W. Alexander | Mower Knife Sharpener | ||
| 2,080,471 | May 18, 1937 | A.L. Warner, W.R. Gillette | Mower guard construction | hay or straw cutters | |