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| All Patents in class 310/216.017 | |||||
| Number | Date | Patentee | Title | Type | |
| 2,279,014 | Apr. 07, 1942 | M.B. Sawyer | Electromagnetic apparatus | induction motors | |
| 2,354,551 | Jul. 25, 1944 | M.B. Sawyer | Electromagnetic apparatus and method of making the same | induction motors | |