Granted Patent
Utility
US 6,564,221 · App. 09/457,274
Random sampling of rows in a parallel processing database system
Inventor:
Ambuj Shatdal
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Dec 8, 1999
Inventor
Ambuj Shatdal
Assignee (at issue)
NCR 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.