Granted Patent
Utility
US 5,691,728 · App. 08/621,853
Method and apparatus for bias error reductioon in an N-port modeformer of the butler matrix type
Inventors:
Allan C. Goetz, Robert G. Riddle
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Mar 25, 1996
Inventors
Allan C. Goetz
Robert G. Riddle
Assignee (at issue)
TRW Limited
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.