Granted Patent
Utility
US 5,293,170 · App. 07/864,461
Global positioning system receiver digital processing technique
Inventors:
Robert G. Lorenz, Roger Helkey, Kamran K. Abadi
Patented Case
View Patent ↗
Granted: Mar 8, 1994
Filed: Apr 6, 1992
Inventors
Robert G. Lorenz
Roger Helkey
Kamran K. Abadi
Assignee (at issue)
Ashtech, 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.