Granted Patent
Utility
US 5,481,614 · App. 08/115,500
Method and apparatus for coding audio signals based on perceptual model
Inventor:
James David Johnston
Patented Case
View Patent ↗
Granted: Jan 2, 1996
Filed: Sep 1, 1993
Inventor
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.