Granted Patent
Utility
US 6,442,382 · App. 08/884,155
Filter switching system and method
Inventor:
Erik Busking
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Jun 27, 1997
Inventor
Erik Busking
Assignee (at issue)
Agere Systems Guardian Corporation
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.