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| Patents for Ottis R. Birney Jr. | |||||
| Picture | Number | Date | Patentee | Title | |
| 2,931,254 | Apr. 05, 1960 | O.R. Birney, Jr., J.W. Birney | Boring Head | ||
| 3,125,903 | Mar. 24, 1964 | J.W. Birney, O.R. Birney, Jr. | Eccentric Boring Head | ||