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| All Patents in class 74/373 | |||||
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| Number | Date | Patentee | Title | Type | |
| 510,707 | Dec. 12, 1893 | M. Powers | Traction Engine | steam traction engines | |
| 1,066,764 | Jul. 08, 1913 | G.W. Smith | Variable-Speed Gearing | milling machines | |