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| All Patents in class 474/199 | |||||
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| Number | Date | Patentee | Title | Type | |
| 901,515 | Oct. 20, 1908 | H. Allen | Driving mechanism for spindles | drill presses | |
| 1,392,957 | Oct. 11, 1921 | F.E. Matthews | Pulley and sheath therefor | ||