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| Patents for M. G. Howe | |||||
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| Number | Date | Patentee | Title | Type | |
| 10,602 | Mar. 07, 1854 | L.B. Tyng | Tail Stock for Turning Lathes | metal lathe accessories and attachments | |
| 11,774 | Oct. 10, 1854 | J.A. Bradshaw | Shingle-machine | shingle machines | |
| 18,509 | Oct. 27, 1857 | D. Lovejoy, G.F. Butterfield | Grinding and polishing metal | cutter grinding | |