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.)
DAVID SYDNEY BUTLER CLIVE BONE ERIC THOMAS JAMES GOODMAN and GEOFFREY HALEY JOHN PATRICK HARDING
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.)
Post Office
Original Assignee
Post Office
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GB5382673Aexternal-prioritypatent/GB1486187A/en
Application filed by Post OfficefiledCriticalPost Office
Application grantedgrantedCritical
Publication of AU489336B2publicationCriticalpatent/AU489336B2/en
Publication of AU7532374ApublicationCriticalpatent/AU7532374A/en