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| All Patents in class 285/223 | |||||
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| Number | Date | Patentee | Title | Type | |
| 213,278 | Mar. 18, 1879 | F.M. Campbell | Adjustable Grain Spout | grain spouts | |
| 428,023 | May 13, 1890 | F. Schoff | Casing for flexible shafts | flexible shafts | |