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
CA781030A
Inventor
H. Currey Charles
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.)
TNC US Holdings Inc
Original Assignee
AC Nielsen Co
Publication date
Application grantedgrantedCritical
Publication of CA781030ApublicationCriticalpatent/CA781030A/en