Granted Patent
Utility
US 6,691,156 · App. 09/523,574
Method for restricting delivery of unsolicited E-mail
Inventors:
Kirk Drummond, Duane Kimbell Fields, Thomas Preston Gregg, Mark Andrew Kolb
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Mar 10, 2000
Inventors
Kirk Drummond
Duane Kimbell Fields
Thomas Preston Gregg
Mark Andrew Kolb
Assignee (at issue)
International Business Machines 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.