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| All Patents in class 279/46.6 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,900,922 | Mar. 14, 1933 | L.R. Evans | Gripping Face for Chucks and Method Of Making the Same | tool holding collets | |
| 4,312,513 | Jan. 26, 1982 | H.F. Swenson | Gear Holding Hydraulically Actuated Chuck | gear making machines | |