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| All Patents in class 188/33 | |||||
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| Number | Date | Patentee | Title | Type | |
| 482,828 | Sep. 20, 1892 | C.L. Heisler | Locomotive | steam locomotives | |
| 1,983,628 | Dec. 11, 1934 | C.G. Mahana | Vehicle Control | railroad motor cars | |