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| Patents for Eugene Cook | |||||
| Number | Date | Patentee | Title | Type | |
| 1,203,178 | Oct. 31, 1916 | E.C. Bowers | Ball-bearing, geared, three jaw chuck. | ||
| 1,264,363 | Apr. 30, 1918 | E.C. Bowers | Ball-bearing, three-jaw chuck with quick-release feature. | ||