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| All Patents in class 414/793.4 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,545,225 | Jul. 07, 1925 | E.W. Zeh | Tile-stacking machine | brick and tile making machines | |
| 1,581,774 | Apr. 20, 1926 | E.W. Zeh | Tile cleaning and stacking machine and method | brick and tile making machines | |