Granted Patent
Utility
US 5,657,426 · App. 08/258,145
Method and apparatus for producing audio-visual synthetic speech
Inventors:
Keith Waters, Thomas Mark Levergood
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: Jun 10, 1994
Inventors
Keith Waters
Thomas Mark Levergood
Assignee (at issue)
Digital Equipment Corporation
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.