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| All Patents in class 81/16 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 210,875 | Dec. 17, 1878 | E.S. Pierce | Three-jaw scroll chuck with conical volute | |
 | 5,332,240 | Jul. 26, 1994 | P. Bedoian | Drill Chuck Key Tool | |