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| Patents for Herman W. Oster | |||||
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| Number | Date | Patentee | Title | Type | |
| 490,676 | Jan. 31, 1893 | H.W. Oster | Adjustable die-stock | tap wrenches and die stocks | |
| 925,220 | Jun. 15, 1909 | H.W. Oster | Geared Die Stock | tap and die holders | |