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| Patents for Leif Fersing | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,443,704 | Jun. 22, 1948 | L. Fersing | Tool Positioning Gauge | tool setting apparatus | |
| 2,473,367 | Jun. 14, 1949 | L. Fersing | Multiple Turning Head | turret lathes | |