Granted Patent
Utility
US 6,509,972 · App. 09/809,685
Tunable filter system with out-of-band reference
Inventor:
Jeffrey Korn
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Mar 15, 2001
Inventor
Jeffrey Korn
Assignee (at issue)
Axsun Technologies, Inc.
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.