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
CA840319A
Inventor
P. E. Kooi Johan
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.)
Keuffel and Esser of Canada Ltd
Original Assignee
Keuffel and Esser of Canada Ltd
Publication date
Application grantedgrantedCritical
Publication of CA840319ApublicationCriticalpatent/CA840319A/en