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.)
Blaw Knox Co
Original Assignee
Blaw Knox 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
Priority claimed from CA054452Aexternal-prioritypatent/CA933397A/en
Application filed by Blaw Knox CofiledCriticalBlaw Knox Co
Priority to CA140,841ApriorityCriticalpatent/CA942973A/en
Application grantedgrantedCritical
Publication of CA942973ApublicationCriticalpatent/CA942973A/en