Granted Patent
Utility
US 5,644,680 · App. 08/452,191
Updating markov models based on speech input and additional information for automated telephone directory assistance
Inventors:
Gregory J. Bielby, Vishwa Gupta, Lauren C. Hodgson, Matthew Lennig, R. Douglas Sharp, Hans Wasmeier
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: May 25, 1995
Inventors
Gregory J. Bielby
Vishwa Gupta
Lauren C. Hodgson
Matthew Lennig
R. Douglas Sharp
Hans Wasmeier
Assignee (at issue)
Nortel Networks Limited
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.