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| Patents for Andrew J. Hoag | |||||
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| Picture | Number | Date | Patentee | Title | |
| 225,560 | Mar. 16, 1880 | A.J. Hoag, E.D. Brown | Traction Engine | ||
| 244,807 | Jul. 26, 1881 | A.J. Hoag | Reversing Gear for Steam Traction Engines | ||
| RE9,951 | Nov. 29, 1881 | A.J. Hoag | Reversing Gear for Steam Traction Engines | ||
| 265,809 | Oct. 10, 1882 | J.A. Drew, A.J. Hoag | Traction Engine | ||
 | 303,516 | Aug. 12, 1884 | A.J. Hoag | Traction Engine | |