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| Patents for Toledo General Mfg. Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,830,679 | Nov. 03, 1931 | C.F. Schenck | Drill spindle | |
 | 1,972,359 | Sep. 04, 1934 | C.F. Schenck | Feed mechanism for tool-carrying spindles | |
 | 2,189,422 | Feb. 06, 1940 | G.W. Irwin | Combined drilling and tapping machine | |
| 2,267,238 | Dec. 23, 1941 | G.W. Irwin | Drill press driving mechanism | ||