Granted Patent
Utility
US 6,567,671 · App. 08/909,387
Wireless communication device with call screening
Inventor:
Umesh J. Amin
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Aug 11, 1997
Inventor
Umesh J. Amin
Assignee (at issue)
AT&T WIRELESS SERVICES, 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.