Granted Patent
Utility
US 5,535,385 · App. 08/444,467
Dealing with side effects of transactions in data base systems using a multi-set algebra
Inventors:
Timothy G. Griffin, Leonid Libkin
Patented Case
View Patent ↗
Granted: Jul 9, 1996
Filed: May 19, 1995
Inventors
Timothy G. Griffin
Leonid Libkin
Assignee (at issue)
AT&T CORP.
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.