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| All Patents in class 285/191 | |||||
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| Number | Date | Patentee | Title | Type | |
| 289,120 | Nov. 27, 1883 | E. Mignault | Universal Angular Knuckle Joint | industrial machine universal joints | |
| 3,039,489 | Jun. 19, 1962 | L.A. Botkin | Valve structure | ||