Granted Patent
Utility
US 5,657,421 · App. 08/353,044
Speech signal transmitter wherein coding is maintained during speech pauses despite substantial shut down of the transmitter
Inventors:
Dietmar Lorenz, Karl Hellwig
Patented Case
View Patent ↗
Granted: Aug 12, 1997
Filed: Dec 9, 1994
Inventors
Dietmar Lorenz
Karl Hellwig
Assignee (at issue)
U.S. Philips Corporation
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.