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
CA867244A
Inventor
Lewin Otto
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.)
COLE STEEL EQUIPMENT Co
Original Assignee
COLE STEEL EQUIPMENT Co
Publication date
Application grantedgrantedCritical
Publication of CA867244ApublicationCriticalpatent/CA867244A/en