Granted Patent
Utility
US 5,408,526 · App. 07/968,026
Conference calling system
Inventors:
James Ross McFarland, Kuang wei Peng
Patented Case
View Patent ↗
Granted: Apr 18, 1995
Filed: Oct 29, 1992
Inventors
James Ross McFarland
Kuang wei Peng
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.