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| All Patents in class 180/424 | |||||
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| Number | Date | Patentee | Title | Type | |
| 453,368 | Jun. 02, 1891 | E. Howland | Steam Steering Gear for Vehicles | traction engine steering apparatus | |
| 496,053 | Apr. 25, 1893 | R. Fullerton | Steering Device for Road Engines | traction engine steering apparatus | |
| 689,186 | Dec. 17, 1901 | C.L. Heisler | Steam Road Roller | steam rollers | |