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