Granted Patent
Utility
US 5,835,570 · App. 08/670,888
Voice-directed telephone directory with voice access to directory assistance
Inventor:
Blake Lane Wattenbarger
Patented Case
View Patent ↗
Granted: Nov 10, 1998
Filed: Jun 26, 1996
Inventor
Blake Lane Wattenbarger
Assignee (at issue)
AT&T CORP.
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.