Granted Patent
Utility
US 6,522,739 · App. 09/474,370
Apparatus and method for multi-access conference call in exchange system
Inventors:
Jin-Hyun Kwon, Byung-Wook Park, Tae Wan Kim, Jae-Sup Kwak, Joon Hyuk Eom
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Dec 29, 1999
Inventors
Jin-Hyun Kwon
Byung-Wook Park
Tae Wan Kim
Jae-Sup Kwak
Joon Hyuk Eom
Assignee (at issue)
Samsung Thales Co., Ltd.
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.