Granted Patent
Utility
US 6,819,204 · App. 10/256,464
Bandpass filter for a radio-frequency signal and tuning method therefor
Inventor:
Jorg Grunewald
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Sep 27, 2002
Inventor
Jorg Grunewald
Assignee (at issue)
Marconi Communications GmbH
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.