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| All Patents in class 74/89.17 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 487,775 | Dec. 13, 1892 | F.H. Richards | Duplex feed mechanism | |
 | 1,005,864 | Oct. 17, 1911 | W.L. Milner | Valve Grinding Apparatus | |
| 2,782,832 | Feb. 26, 1957 | R.M. Shaw, Jr. | Bending Machines | ||
| 3,003,165 | Oct. 10, 1961 | A.S. Charlat | Tool Spindle Drive Means for Sequentially Effecting Rapid Approach, Work Feed and Rapid Withdrawal | ||
 | 3,073,589 | Jan. 15, 1963 | G. Hohwart | Work clamping fixture | |