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| Patents for Fredrick Welker | |||||
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| Number | Date | Patentee | Title | Type | |
| 955,488 | Apr. 19, 1910 | F. Welker | Variable-speed gearing | woodworking machine mechanisms | |
| 977,060 | Nov. 29, 1910 | F. Welker | Grinding-machine | cutter grinding | |