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| All Patents in class 198/629 | |||||
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| Number | Date | Patentee | Title | Type | |
| 747,546 | Dec. 22, 1903 | W.H. Garrett | Conveyor | conveyors and hoppers | |
| 2,232,431 | Feb. 18, 1941 | G.A. Bilocq | Rotating elevator | stone crushers | |