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.)
Dresser Industries Inc
Original Assignee
Dresser Industries 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 CA094,804Aexternal-prioritypatent/CA942594A/en
Application filed by Dresser Industries IncfiledCriticalDresser Industries Inc
Priority to CA159,552ApriorityCriticalpatent/CA949818A/en
Application grantedgrantedCritical
Publication of CA949818ApublicationCriticalpatent/CA949818A/en