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| Patents for Otto Swanstrom | |||||
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| Number | Date | Patentee | Title | Type | |
| 682,506 | Sep. 10, 1901 | O. Swanstrom | Horseshoe | ||
| 2,043,359 | Jun. 09, 1936 | O. Swanstrom | Horseshoe | ||
| D138,662 | Aug. 29, 1944 | O. Swanstrom | Design for a Wrench | ||