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Patents for John O. Olsen
Patents 1 - 2 of 2
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

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