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All Patents in class 403/336 | |||||
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Picture | Number | Date | Patentee | Title | |
![]() | 70,869 | Nov. 12, 1867 | W.E. London | Improvement in shaft-coupling | |
![]() | 939,829 | Nov. 09, 1909 | J.R. Grundy | Insulating shaft-coupling |