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
CA715775A
Inventor
William M. Slater
Original Assignee
BEER PRECAST CONCRETE Ltd
Publication date
Application grantedgrantedCritical
Publication of CA715775ApublicationCriticalpatent/CA715775A/en