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| Patents for Hooven, Owens & Rentschler Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 262,894 | Aug. 15, 1882 | G.H. Helvey | Traction Engine | steam traction engines | |
| 265,499 | Oct. 03, 1882 | G.H. Helvey | Traction Engine | steam traction engines | |