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| All Patents in class 91/343 | |||||
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| Number | Date | Patentee | Title | Type | |
| 16,358 | Jan. 06, 1857 | R.H. Fletcher | Operating Steam Slide Valves | steam engine valve gear | |
| 147,403 | Feb. 10, 1874 | G.R. Cullingworth, H.C. Sergeant, A.H. Elliott, S. Ingersoll | Improvement in steam-engines for rock-drills, &c. | mining apparatus | |