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| Patents for Signa Feltskog | |||||
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| Number | Date | Patentee | Title | Type | |
| 756,854 | Apr. 12, 1904 | R. Brockman, W.W. Helle | Compound Tool | combination tools | |
| 835,317 | Nov. 06, 1906 | O.H. Ostlund | Floor-polishing device | ||