Granted Patent
Utility
US 5,644,571 · App. 08/073,217
Apparatus for message filtering in a network using domain class
Inventor:
Michael J. Seaman
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Jun 4, 1993
Inventor
Michael J. Seaman
Assignee (at issue)
Digital Equipment 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.