Granted Patent
Utility
US 5,717,619 · App. 08/545,968
Cost reduced time varying fir filter
Inventors:
Mark S. Spurbeck, Richard T. Behrens
Patented Case
View Patent ↗
Granted: Feb 10, 1998
Filed: Oct 20, 1995
Inventors
Mark S. Spurbeck
Richard T. Behrens
Assignee (at issue)
Cirrus Logic 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.