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| All Patents in class 73/526 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,099,364 | Jun. 09, 1914 | C.L. Heisler, F.W. Heisler | Governor for Controlling the Speed of Engines and Machinery | steam engine governors | |
| 1,201,821 | Oct. 17, 1916 | F.G. Hobart, C.B. Jahnke | Combined governor and speed-regulator | internal combustion engine governors | |