Granted Patent
Utility
US 6,665,474 · App. 10/080,491
Method of improving selectivity in a tunable waveguide filter
Inventor:
Jan-Olof Wesström
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Feb 22, 2002
Inventor
Jan-Olof Wesström
Assignee (at issue)
Altitun AB
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.