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| Patents for Oscar A. Butterfield | |||||
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| Number | Date | Patentee | Title | Type | |
| 688,062 | Dec. 03, 1901 | O.A. Butterfield | Sieve-Holder | threshers and thrashers | |
| 774,155 | Nov. 08, 1904 | O.A. Butterfield | Band-Cutter for Threshing-Machines | threshers and thrashers | |