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| Patents for Charles W. Clark | |||||
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| Number | Date | Patentee | Title | Type | |
| 745,628 | Dec. 01, 1903 | A.A. Koch | Punching and shearing machine | metal punching machines | |
| 751,522 | Feb. 09, 1904 | A.A. Koch | Power Hammer | forging machines | |