Original Assignee RIDGE TOOL Co OF ELYRIA Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US88425A Inventor Elmer F Jackman Current Assignee (The listed assignees may be inaccurate. Google Patents US2121197A - Screw extractorÄownload PDF Info Publication number US2121197A US2121197A US88425A US8842536A US2121197A US 2121197 A US2121197 A US 2121197A US 88425 A US88425 A US 88425A US 8842536 A US8842536 A US 8842536A US 2121197 A US2121197 A US 2121197A Authority US United States Prior art keywords bore extractor stud torque shank Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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