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
CA903410A
Inventor
A. E. Hathrell John
R. Johnson John
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.)
Thos Storey Engineers Ltd
Original Assignee
Thos Storey Engineers Ltd
Publication date
Application grantedgrantedCritical
Publication of CA903410ApublicationCriticalpatent/CA903410A/en