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
CA793559A
Inventor
Muller Wilhelm
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.)
Richards Bros and Sons Ltd
Original Assignee
Richards Bros and Sons Ltd
Publication date
Application grantedgrantedCritical
Publication of CA793559ApublicationCriticalpatent/CA793559A/en