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| All Patents in class 403/291 | |||||
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| Number | Date | Patentee | Title | Type | |
| 777,215 | Dec. 13, 1904 | C.R. Meston | Shaft-coupling | industrial machine shaft couplings | |
| 1,126,176 | Jan. 26, 1915 | E.M. De Long, C.E. Baker | Take-Up for Flexible Connections | industrial machine mechanisms | |
| 5,335,418 | Aug. 09, 1994 | B. Krivec | Pivotal Hand Tool with Flexural Pivot Joint and Method of Assembling Same | ||