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| Patents for Thomas O'Brien | |||||
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| Number | Date | Patentee | Title | Type | |
| 57,334 | Aug. 21, 1866 | G. Keating | Improvement in miter-boxes | miter boxes | |
| 354,690 | Dec. 21, 1886 | H. Cleary | Tool-holder for grindstones | bench or pedestal grinders | |
| 626,837 | Jun. 13, 1899 | G. Leecock | Self Lubricating Pulley | industrial machine pulleys and belt drive mechanisms | |