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
CA835068A
Inventor
Horwood Norman
Gray Alexander
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.)
GRAY HORWOOD ENGINEERING Ltd
Original Assignee
GRAY HORWOOD ENGINEERING Ltd
Publication date
Application grantedgrantedCritical
Publication of CA835068ApublicationCriticalpatent/CA835068A/en