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| Patents for Wm. Irwin | |||||
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| Number | Date | Patentee | Title | Type | |
| 62,105 | Feb. 12, 1867 | J. Yerkes | Improvement in Making Hammers | hammers | |
| 62,182 | Feb. 19, 1867 | O.O. Chapman | Improvement in Wheel-Wright's Machines | wheelwright | |
| 66,174 | Jun. 25, 1867 | E.H. Roe | Hand Saw | backsaws | |