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
CA673281A
Inventor
Cope Harry
A. Chalex Paul
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.)
Richardson Co
Original Assignee
Richardson Co
Publication date
Application grantedgrantedCritical
Publication of CA673281ApublicationCriticalpatent/CA673281A/en