Granted Patent
Utility
US 5,999,967 · App. 08/910,326
Electronic mail filtering by electronic stamp
Inventor:
Todd Sundsted
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Aug 17, 1997
Inventor
Todd Sundsted
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.