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| Patents for Geometric Tool Co. | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 873,441 | Dec. 10, 1907 | W.A. Leonard | Reversing tap-holder | |
| 876,723 | Jan. 14, 1908 | W.A. Leonard | Tap Holder | ||
| 1,787,932 | Jan. 06, 1931 | A.F. Breitenstein | Floating Tool Holder | ||