Granted Patent
Utility
US 6,256,161 · App. 09/385,788
Echo cancellation for disk drive read circuit
Inventors:
John D. Leighton, Sally A. Doherty
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Aug 30, 1999
Inventors
John D. Leighton
Sally A. Doherty
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.