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
CA763718A
Inventor
A. M. Wilcocks Douglas
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.)
Wharton Engineers Elstree Ltd
Original Assignee
Wharton Engineers Elstree Ltd
Publication date
Application grantedgrantedCritical
Publication of CA763718ApublicationCriticalpatent/CA763718A/en