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| All Patents in class 73/527 | |||||
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| Number | Date | Patentee | Title | Type | |
| 237,354 | Feb. 01, 1881 | A.B. Wood | Steam Governor | steam engine governors | |
| 627,589 | Jun. 27, 1899 | W. Moon | Speed Indicator | automotive tools | |
| 984,439 | Feb. 14, 1911 | F.C. Olin | Governor for Gas Engines | internal combustion engine governors | |
| 2,108,464 | Feb. 15, 1938 | A.K. Antonsen | Engine Governor | internal combustion engine governors | |