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| All Patents in class 91/253 | |||||
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| Number | Date | Patentee | Title | Type | |
| 655,096 | Jul. 31, 1900 | F.A. Large | Governor Cut-Off Valve for Engines | steam engine governors | |
| 893,188 | Jul. 14, 1908 | I.E. McElroy | Cut Off Valve for Engines | steam engine valves | |