Granted Patent
Utility
US 5,488,408 · App. 08/215,899
Serial data channel metering attachment for metering channels to which a receiver is tuned
Inventors:
Kenneth S. Maduzia, Kenneth J. Frett, James Joseph Vitt
Patented Case
View Patent ↗
Granted: Jan 30, 1996
Filed: Mar 22, 1994
Inventors
Kenneth S. Maduzia
Kenneth J. Frett
James Joseph Vitt
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.