Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MCKIERNAN-TERRY DRILL Co
Original Assignee
MCKIERNAN-TERRY DRILL Co
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 as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MCKIERNAN-TERRY DRILL CofiledCriticalMCKIERNAN-TERRY DRILL Co
Application grantedgrantedCritical
Publication of CA159484ApublicationCriticalpatent/CA159484A/fr