Granted Patent
Utility
US 6,539,421 · App. 09/404,757
Messaging application user interface
Inventors:
Barry Appelman, Andrew L. Wick
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Sep 24, 1999
Inventors
Barry Appelman
Andrew L. Wick
Assignee (at issue)
America Online, Inc.
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.