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