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| All Patents in class 474/54 | |||||
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| Number | Date | Patentee | Title | Type | |
| 15,559 | Aug. 19, 1856 | R. Eickemeyer | Improved method of regulating the velocity of feed for sawing-mills | sawmills | |
| 745,789 | Dec. 01, 1903 | C.M. Conradson | Variable Speed Countershaft | metalworking variable speed mechanisms | |