Granted Patent
Utility
US 6,484,158 · App. 08/994,958
Dynamic rule based market research database
Inventors:
Barbara Elizabeth Johnson, James Charles Martin, Kenneth Rabolt, Keri Anderson Healy, Danielle Anne Byron, Ilga Anita Berzkalns
Patented Case
View Patent ↗
Granted: Nov 19, 2002
Filed: Dec 19, 1997
Inventors
Barbara Elizabeth Johnson
James Charles Martin
Kenneth Rabolt
Keri Anderson Healy
Danielle Anne Byron
Ilga Anita Berzkalns
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.