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| All Patents in class 414/432 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,959,077 | Nov. 08, 1960 | L.S. Heym | Tube mill | tube making machines | |
| 3,854,614 | Dec. 17, 1974 | D. Albrecht | Log feeding and turning machine | sawmill log handling | |