Granted Patent
Utility
US 6,236,644 · App. 08/968,154
Method of setting up a conference call
Inventors:
Steven S. Shuman, William A. Sims
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Nov 17, 1997
Inventors
Steven S. Shuman
William A. Sims
Assignee (at issue)
MCI Communications Corporation
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.