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
CA626612A
Inventor
F. Hahnau Robert
D. O'toole Edwin
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.)
INDUSTRIAL PIPE REPAIR Corp
Original Assignee
INDUSTRIAL PIPE REPAIR Corp
Publication date
Application grantedgrantedCritical
Publication of CA626612ApublicationCriticalpatent/CA626612A/en