![]() SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). reassignment DRILL-OUT INCORPORATED, A CORP. Assignors: DRILL-OUT, INCORPORATED Assigned to DRILL-OUT INCORPORATED, A CORP. ![]() Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from US86134286A external-priority Application filed by DRILL OUT Inc filed Critical DRILL OUT Inc Priority to US07/104,656 priority Critical patent/US4777850A/en Priority to BR8804342A priority patent/BR8804342A/en Priority to MX1328388A priority patent/MX167773B/en Application granted granted Critical Publication of US4777850A publication Critical patent/US4777850A/en Assigned to ALDEN CORPORATION reassignment ALDEN CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Original Assignee DRILL OUT Inc 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 US07/104,656 Inventor Eli Polonsky Current Assignee (The listed assignees may be inaccurate. Google Patents Drill-out threaded broken bolt extractorÄownload PDF Info Publication number US4777850A US4777850A US07/104,656 US10465687A US4777850A US 4777850 A US4777850 A US 4777850A US 10465687 A US10465687 A US 10465687A US 4777850 A US4777850 A US 4777850A Authority US United States Prior art keywords extractor drill shaft assembly set forth Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. ![]() Google Patents US4777850A - Drill-out threaded broken bolt extractor ![]() US4777850A - Drill-out threaded broken bolt extractor ![]()
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