Granted Patent
Utility
US 4,888,593 · App. 07/147,255
Time difference of arrival geolocation method, etc.
Inventors:
Joseph S. Friedman, John Paul King, Joseph P. Pride, III
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Dec 15, 1987
Inventors
Joseph S. Friedman
John Paul King
Joseph P. Pride, III
Assignee (at issue)
Signal Sciences 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.