Granted Patent
Utility
US 5,675,488 · App. 08/440,152
Location determination using vector measurements
Inventor:
Graham A. McElhinney
Patented Case
View Patent ↗
Granted: Oct 7, 1997
Filed: May 12, 1995
Inventor
Graham A. McElhinney
Assignee (at issue)
Halliburton Energy Services, 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.