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
CA766652A
Inventor
W. Parsons Ronald
D. Mossop 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.)
ALLCOCK LAIGHT AND WESTWOOD Ltd
Original Assignee
ALLCOCK LAIGHT AND WESTWOOD Ltd
Publication date
Application grantedgrantedCritical
Publication of CA766652ApublicationCriticalpatent/CA766652A/en