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| All Patents in class 56/249 | |||||
| Number | Date | Patentee | Title | Type | |
| 58 | Oct. 19, 1836 | u. unknown | Missing | ||
| 719,703 | Feb. 03, 1903 | N.R. Thibert | Bit-stock | ||
| 2,502,730 | Apr. 04, 1950 | A.A. Koch | Mower | mowing machines | |