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| All Patents in class 92/67 | |||||
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| Number | Date | Patentee | Title | Type | |
| 103,212 | May 17, 1870 | H.E. Long | Rotary Steam Engine | steam engines | |
| 128,062 | Jun. 18, 1872 | C.W. Patten | Improvment in Rotary Steam-Engines | rotary steam engines | |
| 129,635 | Jul. 16, 1872 | W.I. Weed | Improvment in Rotary Engines | rotary steam engines | |