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
CA838388A
Inventor
H. Grove Marvin
R. Van Arsdale Lyle
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.)
M AND J ENGINEERING Co
Original Assignee
M AND J ENGINEERING Co
Publication date
Application grantedgrantedCritical
Publication of CA838388ApublicationCriticalpatent/CA838388A/en