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
CA670953A
Inventor
Williams Harry
C. Holliday William
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.)
Whessoe Ltd
Original Assignee
Whessoe Ltd
Publication date
Application grantedgrantedCritical
Publication of CA670953ApublicationCriticalpatent/CA670953A/en