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| All Patents in class 137/624.15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 873,822 | Dec. 17, 1907 | F.L. Wolfe | Whistle Valve | valves | |
| 1,886,457 | Nov. 08, 1932 | F.D. Winkley | Transplanting Machine | crop planters | |