Granted Patent
Utility
US 6,026,147 · App. 09/090,238
System and method for supervising calls in the exchange
Inventor:
Nam Soo Yeo
Patented Case
View Patent ↗
Granted: Feb 15, 2000
Filed: Jun 4, 1998
Inventor
Nam Soo Yeo
Assignee (at issue)
LG Information & Communications, 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.