Granted Patent
Utility
US 5,909,189 · App. 08/748,647
Group tracking
Inventors:
Samuel S. Blackman, Robert J. Dempster, Thomas S. Nichols
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Nov 14, 1996
Inventors
Samuel S. Blackman
Robert J. Dempster
Thomas S. Nichols
Assignee (at issue)
Raytheon Company
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.