Granted Patent
Utility
US 5,721,902 · App. 08/528,740
Restricted expansion of query terms using part of speech tagging
Inventor:
John Michael Schultz
Patented Case
View Patent ↗
Granted: Feb 24, 1998
Filed: Sep 15, 1995
Inventor
John Michael Schultz
Assignee (at issue)
Infonautics 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.