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.)
Bakerdrill Inc
Original Assignee
Bakerdrill 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 as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US392628Aexternal-prioritypatent/US3871486A/en
Priority claimed from CA257,563Aexternal-prioritypatent/CA1022148A/en
Application filed by Bakerdrill IncfiledCriticalBakerdrill Inc
Priority to CA285,760ApriorityCriticalpatent/CA1026314A/en
Application grantedgrantedCritical
Publication of CA1026314ApublicationCriticalpatent/CA1026314A/en