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| All Patents in class 464/900 | |||||
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| Number | Date | Patentee | Title | Type | |
| 939,829 | Nov. 09, 1909 | J.R. Grundy | Insulating shaft-coupling | industrial machine shaft couplings | |
| 1,802,342 | Apr. 28, 1931 | A.F. Froussard | Shaft Coupling | industrial machine shaft couplings | |
| 2,368,888 | Feb. 06, 1945 | R. Schümann | Small Electric Machine Tool | handheld grinders | |