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
CA715002A
Inventor
L. Streatfield Edward
S. Pearce Alan
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.)
Houseman and Thompson Ltd
Original Assignee
Houseman and Thompson Ltd
Publication date
Application grantedgrantedCritical
Publication of CA715002ApublicationCriticalpatent/CA715002A/en