Granted Patent
Utility
US 6,778,023 · App. 09/917,704
Tunable filter and method of tuning a filter
Inventor:
Kaare Christensen
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Jul 31, 2001
Inventor
Kaare Christensen
Assignee (at issue)
Nokia
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.