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
CA800535A
Inventor
J. Johnson Ernest
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.)
JOHNSON BROTHERS (HANLEY) Ltd
West Midlands Gas Board
Original Assignee
JOHNSON BROTHERS (HANLEY) Ltd
West Midlands Gas Board
Publication date
Application grantedgrantedCritical
Publication of CA800535ApublicationCriticalpatent/CA800535A/en