Granted Patent
Utility
US 6,519,769 · App. 09/188,127
Audience measurement system employing local time coincidence coding
Inventors:
Michael Robert Hopple, Richard Louis Frey, Donald T. McGrath, Robert J. Dunki-Jacobs
Patented Case
View Patent ↗
Granted: Feb 11, 2003
Filed: Nov 9, 1998
Inventors
Michael Robert Hopple
Richard Louis Frey
Donald T. McGrath
Robert J. Dunki-Jacobs
Assignee (at issue)
General Electric 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.