Granted Patent
Utility
US 6,268,766 · App. 09/466,313
Band pass filter from two notch filters
Inventor:
Samuel L. Thomasson
Patented Case
View Patent ↗
Granted: Jul 31, 2001
Filed: Dec 17, 1999
Inventor
Samuel L. Thomasson
Assignee (at issue)
Acoustic 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.