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| Patents for Oscar R. Altwein | |||||
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| Number | Date | Patentee | Title | Type | |
| 982,559 | Jan. 24, 1911 | O.R. Altwein | Chuck-jaws | brace chucks | |
| 1,064,953 | Jun. 17, 1913 | O.R. Altwein | Separable Square | carpenter squares | |