Granted Patent
Utility
US 5,999,928 · App. 08/884,931
Estimating the number of distinct values for an attribute in a relational database table
Inventor:
Weipeng Yan
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Jun 30, 1997
Inventor
Weipeng Yan
Assignee (at issue)
Informix Software, Inc.
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.