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.)
Expired
Application number
CA 31277
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.)
Phillips Drill Co Inc
Original Assignee
Phillips Drill Co Inc
Publication date
Priority to CA 31277priorityCriticalpatent/CA31277S/en
Application grantedgrantedCritical
Publication of CA31277SpublicationCriticalpatent/CA31277S/en