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| All Patents in class 241/178 | |||||
| Number | Date | Patentee | Title | Type | |
| 1,146,590 | Jul. 13, 1915 | R.C. Newhouse | Automatic support for rotary kilns | ||
| 5,873,398 | Feb. 23, 1999 | A. Svensson | Debarking Device | bark processing machines | |