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| Patents for R. A. Howard | |||||
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| Number | Date | Patentee | Title | Type | |
| 21,367 | Aug. 31, 1858 | F.W. Robinson | Straw-carrier of threshing-machines | threshers and thrashers | |
| 21,628 | Sep. 28, 1858 | F.W. Robinson | Improvement in riddles for threshing-machines | threshers and thrashers | |