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
CA856473A
Inventor
B. Dyott Richard
A. Clark George
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.)
GENERAL POST OFFICE
HER MAJESTY'S POSTMASTER GENERAL OF GREAT BRITAIN
Original Assignee
GENERAL POST OFFICE
HER MAJESTY'S POSTMASTER GENERAL OF GREAT BRITAIN
Publication date
Application grantedgrantedCritical
Publication of CA856473ApublicationCriticalpatent/CA856473A/en