Granted Patent
Utility
US 6,778,641 · App. 09/952,795
Telephone independent provision of speech recognition during dial tone and subsequent call progress states
Inventor:
Paul Andrew Erb
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Sep 13, 2001
Inventor
Paul Andrew Erb
Assignee (at issue)
MITEL KNOWLEDGE 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.