Granted Patent
Utility
US 6,608,898 · App. 09/413,677
Band pass and notch filters for echo reduction with less phase distortion
Inventors:
Kendall G. Moore, Samuel L. Thomasson
Patented Case
View Patent ↗
Granted: Aug 19, 2003
Filed: Oct 6, 1999
Inventors
Kendall G. Moore
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.