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| All Patents in class 193/17 | |||||
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| Number | Date | Patentee | Title | Type | |
| 758,606 | Apr. 26, 1904 | J.A. Walsh, E. Bretney | Pneumatic straw-stacker | ||
| 2,025,702 | Dec. 31, 1935 | W.F. Anderson | Material Handling Device | conveyors and hoppers | |