Granted Patent
Utility
US 6,580,392 · App. 09/949,170
Digital beamforming for passive detection of target using reflected jamming echoes
Inventor:
Kai Yu
Patented Case
View Patent ↗
Granted: Jun 17, 2003
Filed: Sep 7, 2001
Inventor
Kai Yu
Assignee (at issue)
LOCKHEED MARTIN 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.