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All Patents in class 81/7.5 | |||||
Number | Date | Patentee | Title | Type | |
394,507 | Dec. 11, 1888 | A.F. Robbins | Mainspring Winder | watchmaker | |
916,197 | Mar. 23, 1909 | A.F. Robbins | Mainspring Winder | watchmaker | |
986,695 | Mar. 14, 1911 | F.R. Cunningham | Mainspring Winder | watchmaker |