Granted Patent
Utility
US 6,148,428 · App. 09/083,699
Method and apparatus for modulation encoding data for storage on a multi-level optical recording medium
Inventors:
Lloyd R. Welch, Terrence L. Wong, Steve McLaughlin
Patented Case
View Patent ↗
Granted: Nov 14, 2000
Filed: May 21, 1998
Inventors
Lloyd R. Welch
Terrence L. Wong
Steve McLaughlin
Assignee (at issue)
Calimetrics, 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.