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| Patents for Joseph O'Brien | |||||
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| Number | Date | Patentee | Title | Type | |
| 493,874 | Mar. 21, 1893 | J. O'Brien | Power Hammer | power hammers | |
| 705,860 | Jul. 29, 1902 | J. O'Brien | Pipe and Nut Wrench | quick adjust wrenches | |