Granted Patent
Utility
US 5,937,421 · App. 08/914,495
Methods, systems and computer program products for performing interactive applications in a client-server based dialog system
Inventors:
Tzvetan Petrov, Hans-Jurgen Richstein, Holger Wittmann
Patented Case
View Patent ↗
Granted: Aug 10, 1999
Filed: Aug 19, 1997
Inventors
Tzvetan Petrov
Hans-Jurgen Richstein
Holger Wittmann
Assignee (at issue)
International Business Machines 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.