Granted Patent
Utility
US 5,425,100 · App. 08/279,271
Universal broadcast code and multi-level encoded signal monitoring system
Inventors:
William L. Thomas, Paul C. Kempter, David H. Harkness
Patented Case
View Patent ↗
Granted: Jun 13, 1995
Filed: Jul 22, 1994
Inventors
William L. Thomas
Paul C. Kempter
David H. Harkness
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.