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| Patents for Alfred D. Clark | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 133,630 | Dec. 03, 1872 | A.D. Clark | Improvement in saw-mills | |
 | 151,355 | May 26, 1874 | A.D. Clark | Improvement in frames and guides for muley-saws | |