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| All Patents in class 403/340 | |||||
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| Number | Date | Patentee | Title | Type | |
| 107,978 | Oct. 04, 1870 | T.F. Taft | Improvement in shaft-couplings | industrial machine shaft couplings | |
| 275,877 | Apr. 17, 1883 | C. Barnes | Shaft Coupling | industrial machine shaft couplings | |
| 419,589 | Jan. 14, 1890 | W. Lewis | Coupling Shafting | industrial machine shaft couplings | |