Granted Patent
Utility
US 5,155,591 · App. 07/425,117
Method and apparatus for providing demographically targeted television commercials
Inventor:
David E. Wachob
Patented Case
View Patent ↗
Granted: Oct 13, 1992
Filed: Oct 23, 1989
Inventor
David E. Wachob
Assignee (at issue)
General Instrument Corporation
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.