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| All Patents in class 91/340 | |||||
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| Number | Date | Patentee | Title | Type | |
| 103,212 | May 17, 1870 | H.E. Long | Rotary Steam Engine | steam engines | |
| 208,565 | Oct. 01, 1878 | J. Butcher | Rotary- Engine | rotary steam engines | |
| 364,374 | Jun. 07, 1887 | F.C. Roberts | Steam Engine | steam engines | |