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| All Patents in class 29/891 | |||||
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| Number | Date | Patentee | Title | Type | |
| 849,329 | Apr. 02, 1907 | W.U. Colthar | Manufacture of cutting-disks | paper cutting machines | |
| 2,047,293 | Jul. 14, 1936 | C.H. Schumacher | Method of making lister shares | plows | |