Granted Patent
Utility
US 5,412,806 · App. 07/932,426
Calibration of logical cost formulae for queries in a heterogeneous DBMS using synthetic database
Inventors:
Weimin Du, Ravi Krishnamurthy, Ming-Chien Shan
Patented Case
View Patent ↗
Granted: May 2, 1995
Filed: Aug 20, 1992
Inventors
Weimin Du
Ravi Krishnamurthy
Ming-Chien Shan
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.