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
CA814248A
Inventor
A. Davies Miles
B. Miller Louie
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.)
Columbia Machine Inc
Original Assignee
Columbia Machine Inc
Publication date
Application grantedgrantedCritical
Publication of CA814248ApublicationCriticalpatent/CA814248A/en