Granted Patent
Utility
US 6,515,603 · App. 09/605,267
Sigma delta modulator with buried data
Inventor:
David S. McGrath
Patented Case
View Patent ↗
Granted: Feb 4, 2003
Filed: Jun 26, 2000
Inventor
David S. McGrath
Assignee (at issue)
LAKE TECHNOLOGY., LTD
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.