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
CA807896A
Inventor
J. Erp Erwin
W. Brady 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.)
Koehring Co
Original Assignee
Erwin J Erp
Koehring Co
Publication date
Application grantedgrantedCritical
Publication of CA807896ApublicationCriticalpatent/CA807896A/en