Granted Patent
Utility
US 5,826,164 · App. 08/548,591
Technique for surveying a radio or a television audience
Inventor:
Lee S. Weinblatt
Patented Case
View Patent ↗
Granted: Oct 20, 1998
Filed: Oct 26, 1995
Inventor
Lee S. Weinblatt
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.