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| All Patents in class 279/148 | |||||
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| Number | Date | Patentee | Title | Type | |
| 671,789 | Apr. 09, 1901 | C. Borgeson | Wrench | socket wrenches | |
| 2,706,544 | Apr. 19, 1955 | R.H. Schuman | Machine Tool Drive | metalworking machine mechanisms | |
| 5,971,681 | Oct. 26, 1999 | I.E. Wolfe, R.J. Schroeder | Drawbar guide ring with drive keys | milling machine accessories | |