Granted Patent
Utility
US 6,163,789 · App. 09/195,295
Digital parametric equalizer with symmetrical cut and boost spectrums
Inventor:
Jianxin Liu
Patented Case
View Patent ↗
Granted: Dec 19, 2000
Filed: Nov 18, 1998
Inventor
Jianxin Liu
Assignee (at issue)
Oak Technology, 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.