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| Patents for Oswald J. Kosiol | |||||
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| Number | Date | Patentee | Title | Type | |
| 289,275 | Nov. 27, 1883 | O.J. Kosiol | Stock for Cutting Threads | tap and die holders | |
| 297,941 | Apr. 29, 1884 | O.J. Kosiol | Screw Cutting Die | taps and dies | |