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| Patents for W. H. Clark | |||||
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| Number | Date | Patentee | Title | Type | |
| 22,802 | Feb. 01, 1859 | I.A. Hedges | Improvement in mills for grinding cane, &c. | sugar cane apparatus | |
| 128,420 | Jun. 25, 1872 | B. Owen | Improvement in sawing-machines | tablesaws | |
| 1,137,093 | Apr. 27, 1915 | N.C. Simonsen | Rod-cutter | metal shearing machines | |