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
CA890679A
Inventor
H. Blixt Clarence
E. Cozby Warren
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.)
No-Joint Concrete Pipe Co
Original Assignee
No-Joint Concrete Pipe Co
Publication date
Application grantedgrantedCritical
Publication of CA890679ApublicationCriticalpatent/CA890679A/en