Granted Patent
Utility
US 6,018,575 · App. 08/925,371
Direct distance dialing (DDD) access to a communications services platform
Inventors:
Karen A. Gross, Eddie L. Pickeral, Thomas W. Lear
Patented Case
View Patent ↗
Granted: Jan 25, 2000
Filed: Sep 8, 1997
Inventors
Karen A. Gross
Eddie L. Pickeral
Thomas W. Lear
Assignee (at issue)
MCI WorldCom. 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.