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| All Patents in class 269/7 | |||||
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| Number | Date | Patentee | Title | Type | |
| 339,120 | Mar. 30, 1886 | J.W. Strong | Chuck | metal lathe chucks | |
| 1,120,530 | Dec. 08, 1914 | O.H. Pieper | Tool Holder | tool holders | |
| 1,406,006 | Feb. 07, 1922 | B.M. Hanson | Tool Holder | metalworking machine tool holders | |