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
CA630223A
Inventor
O. Copland William
S. Faulkner Douglas
B. Merriman Horace
D. Sansum Robert
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.)
Gerrard Industries Ltd
Rylands Brothers Ltd
Original Assignee
Gerrard Industries Ltd
Rylands Brothers Ltd
Publication date
Application grantedgrantedCritical
Publication of CA630223ApublicationCriticalpatent/CA630223A/en