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| All Patents in class 198/633 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,761,470 | Jun. 03, 1930 | G.L. Fisk | Cooling Bed | ||
| 3,486,602 | Dec. 30, 1969 | W.H. Zuercher | Transfer system overdrop with lumber retarder | woodworking machine stockfeeding mechanisms | |