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| All Patents in class 411/271 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 475,055 | May 17, 1892 | R.C. Ellrich | Tool-chuck | |
 | 1,279,919 | Sep. 24, 1918 | L. Scusa | Gage | |
 | 1,692,460 | Nov. 20, 1928 | C.L. Mattison | Detachable bearing head for cutter shafts and the like | |