Granted Patent
Utility
US 4,589,131 · App. 06/421,883
Voiced/unvoiced decision using sequential decisions
Inventors:
Stephan Horvath, Yung-Shain Wu
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Sep 23, 1982
Inventors
Stephan Horvath
Yung-Shain Wu
Assignee (at issue)
Gretag Aktiengesellschaft
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.