Granted Patent
Utility
US 5,548,615 · App. 08/057,060
Methods and apparatus for rotationally invariant multilevel coding
Inventor:
Lee-Fang Wei
Patented Case
View Patent ↗
Granted: Aug 20, 1996
Filed: May 3, 1993
Inventor
Lee-Fang Wei
Assignee (at issue)
AT&T CORP.
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.