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| All Patents in class 91/155 | |||||
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| Number | Date | Patentee | Title | Type | |
| 101,617 | Apr. 05, 1870 | W.M. Henderson | Compound Engine | compound steam engines | |
| 105,941 | Aug. 02, 1870 | W.M. Henderson | Direct Acting Compound Engine | compound steam engines | |