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
CA653763A
Inventor
Smyth Donald
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.)
Brush Co Ltd
Original Assignee
Brush Co Ltd
Publication date
Application grantedgrantedCritical
Publication of CA653763ApublicationCriticalpatent/CA653763A/en