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| Patents for William Holmes | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,191X | Apr. 04, 1820 | W. Holmes | Twisted screw auger for boring guns | gunsmith | |
| 4,589X | Nov. 26, 1826 | W. Holmes, S.C. Mott | Grate and blower for Lehigh coal | household tools | |
| 141,036 | Jul. 22, 1873 | S. Cook | Improvement in saws | saw teeth | |
| 320,550 | Jun. 23, 1885 | J.W. McAuley, G.S. Gardiner | Saw-guide | circular saw accessories | |
| 554,994 | Feb. 18, 1896 | W. Holmes, P.D. Dye | Pipe and Nut Wrench | pipe and nut combination wrenches | |