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
CA671177A
Inventor
S. Ling Thomas
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.)
George Scott and Son London Ltd
Original Assignee
George Scott and Son London Ltd
Publication date
Application grantedgrantedCritical
Publication of CA671177ApublicationCriticalpatent/CA671177A/en