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| Patents for O. Sauwen | |||||
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| Number | Date | Patentee | Title | Type | |
| 685,347 | Oct. 29, 1901 | G. Richards | Metal Planing and Shaping Machine | metal shapers | |
| 685,348 | Oct. 29, 1901 | G. Richards | Metal Planing Machine | metal shapers | |