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| Patents for Jay Clarence Downer | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 254,843 | Mar. 14, 1882 | E.W. Ross | Extensible universal joint for shafts | |
![]() | 255,196 | Mar. 21, 1882 | E.W. Ross | Band or fly wheel | |