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| Patents for Jay Clarence Downer | |||||
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| Number | Date | Patentee | Title | Type | |
| 254,843 | Mar. 14, 1882 | E.W. Ross | Extensible universal joint for shafts | industrial machine mechanisms | |
| 255,196 | Mar. 21, 1882 | E.W. Ross | Band or fly wheel | bandsaws | |