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
CA683844A
Inventor
H. Greening John
F. Horgan James
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.)
Micromatic Hone Corp
Original Assignee
Micromatic Hone Corp
Publication date
Application grantedgrantedCritical
Publication of CA683844ApublicationCriticalpatent/CA683844A/en