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| Patents for Charles D. Clark | |||||
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| Picture | Number | Date | Patentee | Title | |
| 326,291 | Sep. 15, 1885 | G. Hanson, C.D. Clark | Saw-mill set-works | ||
 | 799,533 | Sep. 12, 1905 | C.D. Clark | Micrometer Height Gage | |