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| All Patents in class 411/316 | |||||
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| Number | Date | Patentee | Title | Type | |
| 582,032 | May 04, 1897 | D.F. Allerton | Nut Lock | auxiliary wrenches | |
| 1,886,177 | Nov. 01, 1932 | E. Gairing | Boring Tool and Holder | drilling and boring tool holders | |