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| All Patents in class 73/504.04 | |||||
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| Number | Date | Patentee | Title | Type | |
| 707,792 | Aug. 26, 1902 | J.A. Seymour, J.E. McIntosh | Adjuster for Centrifugal Governors | steam engine governors | |
| 1,287,293 | Dec. 10, 1918 | W.B. Gorr | Governor | steam engine governors | |