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| All Patents in class 277/487 | |||||
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| Number | Date | Patentee | Title | Type | |
| 74,750 | Feb. 25, 1868 | S.E. Chubbuck, I.Y. Chubbuck | Improvement in pistons | steam engine pistons | |
| 924,789 | Jun. 15, 1909 | J. Rigg, J. Jones | Packing Device for Pistons, Piston Valves and the Like | piston ring and packing | |