Granted Patent
Utility
US 6,249,757 · App. 09/250,685
System for detecting voice activity
Inventor:
David Grant Cason
Patented Case
View Patent ↗
Granted: Jun 19, 2001
Filed: Feb 16, 1999
Inventor
David Grant Cason
Assignee (at issue)
3Com 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.