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| All Patents in class 474/199 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 901,515 | Oct. 20, 1908 | H. Allen | Driving mechanism for spindles | |
 | 1,105,529 | Jul. 28, 1914 | A.E. Newton | Spindle-driving mechanism | |
 | 1,392,957 | Oct. 11, 1921 | F.E. Matthews | Pulley and sheath therefor | |
| 2,955,392 | Oct. 11, 1960 | G.A. Carlson | Belt pulley and bearing assembly | ||