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
CA711826A
Inventor
F. Hesketh 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.)
HER MAJESTY'S POSTMASTER GENERAL OF GREAT BRITAIN
Original Assignee
HER MAJESTY'S POSTMASTER GENERAL OF GREAT BRITAIN
Publication date
Application grantedgrantedCritical
Publication of CA711826ApublicationCriticalpatent/CA711826A/en