Granted Patent
Utility
US 4,930,011 · App. 07/227,187
Method and apparatus for identifying individual members of a marketing and viewing audience
Inventor:
David A. Kiewit
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Aug 2, 1988
Inventor
David A. Kiewit
Assignee (at issue)
A.C. Nielsen Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.