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| Patents for Charles J. Lofdahl | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 1,399,631 | Dec. 06, 1921 | C.A. Lofdahl, C.J. Lofdahl | Plane-Scraper | |
 | 1,607,403 | Nov. 16, 1926 | C.J. Lofdahl | Stair Saw | |