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
CA825857A
Inventor
J. Voisey Edwin
D. Burton John
R. Brooks Clive
W. Davidson John
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.)
Greater London Council
Original Assignee
Greater London Council
Publication date
Application grantedgrantedCritical
Publication of CA825857ApublicationCriticalpatent/CA825857A/en