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| Patents for William Mitchell | |||||
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| Picture | Number | Date | Patentee | Title | |
| 459X | Jun. 07, 1803 | W. Mitchell, T. Bedwell | Improvement in Extracting the Effective Matter Contained in Barks for Dying | ||
| 2,764X | Mar. 26, 1817 | W. Mitchell | Machine for brick making and clay grinding | ||
| 7,825X | Nov. 19, 1833 | W. Mitchell | Straw cutter | ||
 | 848,672 | Apr. 02, 1907 | J.F. Mitchell, W. Mitchell | Bench Drill | |