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| Patents for Alfred F. Welch | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,566,939 | Dec. 22, 1925 | A.F. Welch | Dynamo-electric machine | induction motors | |
| 1,852,829 | Apr. 05, 1932 | A.F. Welch | Dynamo electric machine | induction motors | |