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
CA814791A
Inventor
J. Duurkoop Hendrik
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.)
Machinefabriek en Technische Handelsonderneming MH Van der Graaf BV
Original Assignee
Machinefabriek en Technische Handelsonderneming MH Van der Graaf BV
Publication date
Application grantedgrantedCritical
Publication of CA814791ApublicationCriticalpatent/CA814791A/en