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| Patents for M. H. Merriam | |||||
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| Number | Date | Patentee | Title | Type | |
| 11,586 | Aug. 22, 1854 | W.W. Nichols, M.H. Merriam | Tool Rest for Turning Lathes | metal lathes | |
| 15,862 | Oct. 07, 1856 | C.C. Walworth | Vise | ||