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| All Patents in class 100/229A | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,734,009 | May 22, 1973 | E.O. Engerbretsen | Compactor and drive assembly | ||
| 3,757,683 | Sep. 11, 1973 | E.O. Engerbretsen, E. Grunewald | Compactor drive chain tensioning apparatus | ||