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| All Patents in class 414/791.6 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,581,774 | Apr. 20, 1926 | E.W. Zeh | Tile cleaning and stacking machine and method | ||
 | 3,292,783 | Dec. 20, 1966 | W.W. Quist, K.W. Bullock | Lumber sorter and stacker apparatus | |