Granted Patent
Utility
US 6,219,350 · App. 09/270,045
ATM cell converting apparatus which includes tone and DTMF generating function and method using the same
Inventor:
Tae Jae Lee
Patented Case
View Patent ↗
Granted: Apr 17, 2001
Filed: Mar 16, 1999
Inventor
Tae Jae Lee
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.