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| All Patents in class 91/241 | |||||
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| Number | Date | Patentee | Title | Type | |
| 331,858 | Dec. 08, 1885 | D.A. Woodbury | Balanced Slide Valve | steam engine valves | |
| 362,525 | May 10, 1887 | M.R. Moore | Balanced Slide Valve | steam engine valves | |
| 912,991 | Feb. 23, 1909 | J.F. Chuse | Steam Engine | steam engines | |
| 1,293,713 | Feb. 11, 1919 | H.A. Chuse | Steam Engine | steam engine valves | |