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| All Patents in class 91/258 | |||||
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| Number | Date | Patentee | Title | Type | |
| 19,134 | Jan. 19, 1858 | A. Crosby | Variable cut-off for steam-engines | steam engine valve gear | |
| 35,176 | May 06, 1862 | A.K. Rider | Cut-Off Valve | steam engine valves | |