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| All Patents in class 81/7.5 | |||||
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| Number | Date | Patentee | Title | Type | |
| 308,096 | Nov. 18, 1884 | A.F. Robbins | Mainspring Winder for Watches | watchmaker | |
| 325,973 | Sep. 08, 1885 | A.F. Robbins | Mainspring-Winder | watchmaker | |
| 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 | |