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
CA876255A
Inventor
F. Elsworth John
Atkins Barry
P. Sever Bernard
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.)
Kenrick and Jefferson Ltd
Original Assignee
Kenrick and Jefferson Ltd
Publication date
Application grantedgrantedCritical
Publication of CA876255ApublicationCriticalpatent/CA876255A/en