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| All Patents in class 180/8.1 | |||||
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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 | |
| 130,085 | Jul. 30, 1872 | G.N. Tibbles | Improvements in Traction Engine | steam traction engines | |
| 287,709 | Oct. 30, 1883 | B.F. Opp | Road Engine | steam road engines | |