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| Patents for D. L. O'Neill | |||||
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| Number | Date | Patentee | Title | Type | |
| 566,176 | Aug. 18, 1896 | H. Hunt, Jr., H. Hunt | Combination Tool | bicycle or pocket wrenches | |
| 1,028,295 | Jun. 04, 1912 | T.B. Williams, F.L. Smith | Valve-seat-dressing tool | automotive tools | |