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| All Patents in class 57/304 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,936,656 | May 17, 1960 | F. Conover | Power Turret for Vertical Boring Mill | tool changers and storage mechanisms | |
| 2,940,366 | Jun. 14, 1960 | F. Conover | Power Operated Pendant Control Station | vertical boring mills | |