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| All Patents in class 91/458 | |||||
| Picture | Number | Date | Patentee | Title | |
| 588,655 | Aug. 24, 1897 | J.F. Raders | Non-Centrifugal Governor and Speed Indicator | ||
| 1,088,079 | Feb. 24, 1914 | F.M. Leavitt | Engine-governor | ||