![]() ![]() 238000005553 drilling Methods 0.000 claims abstract description 11.241000013987 Colletes Species 0.000 claims abstract description 49.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 US537243 external-priority Application filed by Alden Corp filed Critical Alden Corp Publication of EP0451256A1 publication Critical patent/EP0451256A1/en Publication of EP0451256A4 publication Critical patent/EP0451256A4/en Application granted granted Critical Publication of EP0451256B1 publication Critical patent/EP0451256B1/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links ![]() Original Assignee Alden Corp 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.) ( en Inventor Eli Polonsky Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number EP90916914A Other languages German ( de) ![]()
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