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
CA763877A
Inventor
Vrijma Berend
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.)
FABRIEK VAN BOUWMATERIALEN LOE
Original Assignee
FABRIEK VAN BOUWMATERIALEN LOE
Publication date
Application grantedgrantedCritical
Publication of CA763877ApublicationCriticalpatent/CA763877A/en