Granted Patent
Utility
US 6,587,121 · App. 08/994,617
Graphical table of contents for a help system
Inventors:
Grant Nelson, Robert J. Gambrel
Patented Case
View Patent ↗
Granted: Jul 1, 2003
Filed: Dec 19, 1997
Inventors
Grant Nelson
Robert J. Gambrel
Assignee (at issue)
Unisys 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.