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
CA749815A
Inventor
Duchemin Michel
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.)
Ressorts du Nord SA
Original Assignee
Ressorts du Nord SA
Publication date
Application grantedgrantedCritical
Publication of CA749815ApublicationCriticalpatent/CA749815A/en