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| Patents for Lafayette Caldwell | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,785 | Oct. 09, 1844 | E. Gould | Machine for combing wool | ||
| 4,053 | May 16, 1845 | W.H. Taylor, A.P. Norton | Parallel bench-vise | leg vises | |
| 4,056 | May 21, 1845 | J. Leffel | Improvement in water-wheels | water wheels | |
| 4,091 | Jun. 25, 1845 | H. Quin | Self-setting sawmill | sawmills | |