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| Patents for Albert Olof Melcher Löfgren | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,303,809 | May 13, 1919 | A.O. Löfgren | Portable sawing mechanism | ||
 | RE15,294 | Feb. 28, 1922 | A.O. Löfgren | Portable sawing mechanism | |