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
CA603964A
Inventor
S. Delapena Leslie
G. Jones David
F. Frost Leonard
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.)
Delapena and Son Ltd
Original Assignee
Delapena and Son Ltd
Publication date
Application grantedgrantedCritical
Publication of CA603964ApublicationCriticalpatent/CA603964A/en