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| All Patents in class 254/328 | |||||
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| Number | Date | Patentee | Title | Type | |
| 129,984 | Jul. 30, 1872 | D.C. Pierce | Improvement in Traction-Engines | traction engine propulsion components | |
| 320,743 | Jun. 23, 1885 | A.C. Ames | Traction Engine | steam traction engines | |
| 812,137 | Feb. 06, 1906 | W.S. Kelley | Traction Engine | steam traction engines | |