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
CA768550A
Inventor
F. Rayner Allan
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.)
WESTCON ENGINEERING AND CONTRACTORS Ltd
Original Assignee
WESTCON ENGINEERING AND CONTRACTORS Ltd
Publication date
Application grantedgrantedCritical
Publication of CA768550ApublicationCriticalpatent/CA768550A/en