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| All Patents in class 92/121 | |||||
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| Number | Date | Patentee | Title | Type | |
| 103,212 | May 17, 1870 | H.E. Long | Rotary Steam Engine | steam engines | |
| 208,149 | Sep. 17, 1878 | B. Brazelle | Improvement in governors for steam-engines | steam engine governors | |