3/20/2024 0 Comments Mac drill bits lifetime fitness![]() Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Bruce A Mackey filed Critical Bruce A Mackey Priority to US349922A priority Critical patent/US2752965A/en Application granted granted Critical Publication of US2752965A publication Critical patent/US2752965A/en Links ![]() Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US349922A Inventor Bruce A Mackey Original Assignee Bruce A Mackey Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents US2752965A - Drill bit constructionÄownload PDF Info Publication number US2752965A US2752965A US349922A US34992253A US2752965A US 2752965 A US2752965 A US 2752965A US 349922 A US349922 A US 349922A US 34992253 A US34992253 A US 34992253A US 2752965 A US2752965 A US 2752965A Authority US United States Prior art keywords head blade drill bit edges drill Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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