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| All Patents in class 73/508 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 494,746 | Apr. 04, 1893 | F. Phillips | Governor for steam-engines | ||
| 640,673 | Jan. 02, 1900 | G.W. Lewis | Gas Engine | ||
 | 667,595 | Feb. 05, 1901 | F.W. Spacke | Automatic Stop for Governors | |
| 868,119 | Oct. 15, 1907 | R.H. Pascall | Governor | ||
| 979,289 | Dec. 20, 1910 | S.S. Hall | Self Locking Automatic Stop for Governors | ||
 | 1,121,201 | Dec. 15, 1914 | W.O. Platt | Governor | |