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| All Patents in class 411/946 | |||||
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| Number | Date | Patentee | Title | Type | |
| 582,032 | May 04, 1897 | D.F. Allerton | Nut Lock | auxiliary wrenches | |
| 3,696,834 | Oct. 10, 1972 | W. Vonhoff, Jr. | Fluid control device | ||