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| All Patents in class 411/516 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,114,123 | Oct. 20, 1914 | H. Dalton | Threadless nut or collar | |
| 1,886,177 | Nov. 01, 1932 | E. Gairing | Boring Tool and Holder | ||
| 2,021,241 | Nov. 19, 1935 | A.W. Mall | Quick detachable coupling | ||