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| Patents for Michael Hanna | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,140,957 | Dec. 20, 1938 | M. Hanna | Milling Attachment | milling machine accessories | |
| CA-387,198 | Mar. 05, 1940 | M. Hanna | Attachment for cutting keyways | milling machine accessories | |