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| All Patents in class 92/207 | |||||
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| Number | Date | Patentee | Title | Type | |
| 31,303 | Feb. 05, 1861 | T.S. Davis | Steam Engine Valve | steam engine pistons | |
| 114,427 | May 02, 1871 | P. Estes | Improvement in Piston-Packings | piston ring and packing | |
| RE6,128 | Nov. 10, 1874 | T.S. Davis | Piston Packings | piston ring and packing | |