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| All Patents in class 137/48 | |||||
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| Number | Date | Patentee | Title | Type | |
| 9,336 | Oct. 12, 1852 | J. Tremper | Governor | steam engine governors | |
| 158,300 | Dec. 29, 1874 | M. Muchin | Governors for Steam Engines | steam engine governors | |
| 591,447 | Oct. 12, 1897 | B.C. Ball, F.H. Ball | Engine Governor | steam engine governors | |