Granted Patent
Utility
US 5,081,460 · App. 07/643,968
Method and apparatus for testing phase shifter modules of a phased array antenna
Inventor:
Sien-Chang C. Liu
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: Jan 22, 1991
Inventor
Sien-Chang C. Liu
Assignee (at issue)
Hughes Aircraft 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.