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| All Patents in class 56/300 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 95,638 | Oct. 12, 1869 | E.M. Birdsall | Improvement in harvester-cutters | |
| 2,217,741 | Oct. 15, 1940 | W.R. Gillette | Cutter bar | ||