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
CA874173A
Inventor
E. Sixt Marty
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.)
Advanced Drainage Systems Inc
Original Assignee
Advanced Drainage Systems Inc
Publication date
Application grantedgrantedCritical
Publication of CA874173ApublicationCriticalpatent/CA874173A/en