Granted Patent
Utility
US 4,991,213 · App. 07/199,015
Speech specific adaptive transform coder
Inventor:
Philip J. Wilson
Patented Case
View Patent ↗
Granted: Feb 5, 1991
Filed: May 26, 1988
Inventor
Philip J. Wilson
Assignee (at issue)
Pacific Communication Sciences, 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.