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| All Patents in class 180/440 | |||||
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| Number | Date | Patentee | Title | Type | |
| 502,820 | Aug. 08, 1893 | B. Jackson | Traction Engine | steam traction engines | |
| 529,495 | Nov. 20, 1894 | B. Jackson | Steering Mechanism for Traction Engines | traction engine steering apparatus | |
| 626,484 | Jun. 06, 1899 | L. Brown | Steering Gear for Portable Engines | steering apparatus | |