Granted Patent
Utility
US 5,948,043 · App. 08/747,161
Navigation system using GPS data
Inventor:
Darrell Mathis
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: Nov 8, 1996
Inventor
Darrell Mathis
Assignee (at issue)
Etak, 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.