Granted Patent
Utility
US 6,275,458 · App. 09/253,808
Method and apparatus for reading and writing a multi-level signal from an optical disc
Inventors:
Terrence L. Wong, David Lee, Richard L. Martin, Steven Russel Spielman
Patented Case
View Patent ↗
Granted: Aug 14, 2001
Filed: Feb 18, 1999
Inventors
Terrence L. Wong
David Lee
Richard L. Martin
Steven Russel Spielman
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.