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
CA871827A
Inventor
Smith Robin
A. Bartley-Denniss George
H. R. Spiller Basil
Phillipson 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.)
Decca Ltd
Original Assignee
Decca Ltd
Publication date
Application grantedgrantedCritical
Publication of CA871827ApublicationCriticalpatent/CA871827A/en