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| Patents for Oswald H. Hansen | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,574,087 | Feb. 23, 1926 | O.H. Hansen | Chair spring | chair maker | |
| 1,574,088 | Feb. 23, 1926 | O.H. Hansen | Chair | chair maker | |
| 1,589,847 | Jun. 22, 1926 | O.H. Hansen | Chair | chair maker | |