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Patents for John O. Olsen | |||||
Number | Date | Patentee | Title | Type | |
2,476,762 | Jul. 19, 1949 | J.O. Olsen, J.N. Petre | Chuck | screwdriver mechanisms | |
CA-482,193 | Apr. 01, 1952 | J.O. Olsen, J.N. Petre | Mandrins |