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| Patents for J. F. Oller | |||||
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| Number | Date | Patentee | Title | Type | |
| 244,758 | Jul. 26, 1881 | F.F. Landis | Steam-engine valve-gear | valve gear | |
| 245,841 | Aug. 16, 1881 | F.F. Landis | Traction Engine | steam traction engines | |