Granted Patent
Utility
US 6,021,385 · App. 08/809,675
System for detecting defective speech frames in a receiver by calculating the transmission quality of an included signal within a GSM communication system
Inventors:
Kari Juhani Jarvinen, Janne Vainio
Patented Case
View Patent ↗
Granted: Feb 1, 2000
Filed: Mar 19, 1997
Inventors
Kari Juhani Jarvinen
Janne Vainio
Assignee (at issue)
Nokia Telecommunications Oy
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.