Granted Patent
Utility
US 6,724,248 · App. 10/127,357
DC offset self-calibration system for a digital switching amplifier
Inventor:
William D. Llewellyn
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Apr 19, 2002
Inventor
William D. Llewellyn
Assignee (at issue)
Tripath 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.