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
CA721897A
Inventor
Walsh 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.)
F Smith and Co Whitworth Ltd
Original Assignee
F Smith and Co Whitworth Ltd
Publication date
Application grantedgrantedCritical
Publication of CA721897ApublicationCriticalpatent/CA721897A/en