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| All Patents in class 403/304 | |||||
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| Number | Date | Patentee | Title | Type | |
| 796,854 | Aug. 08, 1905 | W.H. Nicholson | Shaft Coupling | industrial machine shaft couplings | |
| 934,160 | Sep. 14, 1909 | J.P. Golden | Shaft Coupling | industrial machine shaft couplings | |