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| Patents for Andrew Caldwell | |||||
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| Picture | Number | Date | Patentee | Title | |
| 9,046X | Aug. 20, 1835 | A. Caldwell | Spinning hemp and flax | ||
 | 5,334 | Oct. 16, 1847 | A. Caldwell | Improvement in cutter-heads for planing-machines | |