Granted Patent
Utility
US 6,785,381 · App. 09/994,405
Telephone having improved hands free operation audio quality and method of operation thereof
Inventors:
Martin Gärtner, Thomas Slagle
Patented Case
View Patent ↗
Granted: Aug 31, 2004
Filed: Nov 27, 2001
Inventors
Martin Gärtner
Thomas Slagle
Assignee (at issue)
Siemens Information and Communication Networks, Inc.
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.