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| All Patents in class 280/443 | |||||
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| Number | Date | Patentee | Title | Type | |
| 593,542 | Nov. 09, 1897 | O. Olson | Automatic Vehicle-Steering Device | traction engine tenders | |
| 2,174,493 | Sep. 26, 1939 | L.H. Vanderwerf | Automotive vehicle | ||