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| All Patents in class 222/561 | |||||
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| Number | Date | Patentee | Title | Type | |
| 285,711 | Sep. 25, 1883 | L.M. Watkins | Fertilizer Attachment for Grain Drills | crop planters | |
| 307,610 | Nov. 04, 1884 | H.L. Whitman | Broadcast seed-sower | seeders | |