Granted Patent
Utility
US 6,427,133 · App. 09/230,866
Process and device for evaluating the quality of a transmitted voice signal
Inventors:
Martin Paping, Thomas Fahnle
Patented Case
View Patent ↗
Granted: Jul 30, 2002
Filed: Apr 19, 1999
Inventors
Martin Paping
Thomas Fahnle
Assignee (at issue)
Ascom Infrasys AG
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.