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| All Patents in class 123/56.2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 127,747 | Jun. 11, 1872 | J. Donnelly | Improvement in Apparatus for Operating Steam-Engine | steam engines | |
| 174,590 | Mar. 07, 1876 | H. Tesseyman | Valve Gear For Direct-Acting Engines | steam engine valve gear | |