Granted Patent
Utility
US 5,742,929 · App. 08/654,753
Arrangement for comparing subjective dialogue quality in mobile telephone systems
Inventors:
Robert A. Kallman, Stefan Lidbrink
Patented Case
View Patent ↗
Granted: Apr 21, 1998
Filed: May 28, 1996
Inventors
Robert A. Kallman
Stefan Lidbrink
Assignee (at issue)
Televerket
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.