Granted Patent
Utility
US 5,535,300 · App. 08/284,324
Perceptual coding of audio signals using entropy coding and/or multiple power spectra
Inventors:
Joseph L. Hall, James David Johnston
Patented Case
View Patent ↗
Granted: Jul 9, 1996
Filed: Aug 2, 1994
Inventors
Joseph L. Hall
James David Johnston
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.