Granted Patent
Utility
US 5,909,489 · App. 08/828,191
Method of and circuit arrangement for improving the transmission properties of an echo affected transmission link in a telecommunications network
Inventors:
Hans Jurgen Matt, Michael D. Walker
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Mar 21, 1997
Inventors
Hans Jurgen Matt
Michael D. Walker
Assignee (at issue)
Alcatel Alsthom Compagnie Generale d'Electricite
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.