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| Patents for Charles M. Kuhn | |||||
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| Number | Date | Patentee | Title | Type | |
| 618,796 | Jan. 31, 1899 | F.P. Kuhn | Tool Holder | lathe tool holders and tool posts | |
| 966,755 | Aug. 09, 1910 | F.P. Kuhn | Tool Holder | lathe tool holders and tool posts | |