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| Patents for L. W. Howes | |||||
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| Number | Date | Patentee | Title | Type | |
| 20,170 | May 04, 1858 | R. Packard | Windlass | windlasses | |
| 389,899 | Sep. 25, 1888 | D.R. Porter | Pipe Wrench | quick adjust wrenches | |
| 407,736 | Jul. 23, 1889 | W.A. Long | Carving-machine | carving machines | |