Granted Patent
Utility
US 6,760,415 · App. 09/527,709
Voice telephony system
Inventor:
Troy Beecroft
Patented Case
View Patent ↗
Granted: Jul 6, 2004
Filed: Mar 17, 2000
Inventor
Troy Beecroft
Assignee (at issue)
Qwest Communications International 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.