Granted Patent
Utility
US 6,687,335 · App. 09/050,871
User interface and system to facilitate telephone circuit maintenance and testing
Inventors:
William R. Jones, Michael D. Cheaney, Rod A. Opel
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Mar 31, 1998
Inventors
William R. Jones
Michael D. Cheaney
Rod A. Opel
Assignee (at issue)
The Southwestern Bell Telephone Co.
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.