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
CA590606A
Inventor
R. Findlay Gordon
W. Schuler Frederic
O. Dipietro William
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.)
National Research Corp
Original Assignee
National Research Corp
Publication date
Application grantedgrantedCritical
Publication of CA590606ApublicationCriticalpatent/CA590606A/en