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
CA746348A
Inventor
J. Ferdinand Irwin
R. Lopatka Dale
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.)
Hirsh Manufacturing Co SA Co
Original Assignee
Hirsh Manufacturing Co SA Co
Publication date
Application grantedgrantedCritical
Publication of CA746348ApublicationCriticalpatent/CA746348A/en