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| Patents Granted on 1880-09-28 | |||||
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| Number | Date | Patentee | Title | Type | |
| RE9,388 | Sep. 28, 1880 | A.K. Rider | Pump Valve | pump valves | |
| 232,634 | Sep. 28, 1880 | T.S. Durgin | Gage-chisel for wood-turning | turning chisels | |
| 232,739 | Sep. 28, 1880 | J.F. Marks | Traction Engine | steam traction engines | |
| 232,754 | Sep. 28, 1880 | W.J. Perkins | Gang-edger | circular ripsaws | |