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| All Patents in class 74/404.5 | |||||
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| Number | Date | Patentee | Title | Type | |
| 39,799 | Sep. 08, 1863 | F. Douglas | Improvement in governors for steam-engines | steam engine governors | |
| 133,192 | Nov. 19, 1872 | H. Bilgram | Improvement in steam-engine governors | steam engine governors | |
| 310,838 | Jan. 13, 1885 | R. McKenna | Ball Governor | steam engine governors | |
| 485,361 | Nov. 01, 1892 | F.J. Waters | Engine Governor | steam engine governors | |
| 754,469 | Mar. 15, 1904 | N. Lombard | Governor | water wheel governors | |