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| All Patents in class 74/DIG.1 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 191,084 | May 22, 1877 | H. Tabor | Governor for Steam-Engines | ||
| 2,902,874 | Sep. 08, 1959 | V.v. Sundt | Speed Control Mechanism | ||