Granted Patent
Utility
US 6,498,921 · App. 09/387,932
Method and system to answer a natural-language question
Inventors:
Chi Fai Ho, Peter P. Tong
Patented Case
View Patent ↗
Granted: Dec 24, 2002
Filed: Sep 1, 1999
Inventors
Chi Fai Ho
Peter P. Tong
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.