Granted Patent
Utility
US 6,434,407 · App. 09/453,643
Speakerphone feature for a wireless handset
Inventor:
Steven R. Cook
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Dec 3, 1999
Inventor
Steven R. Cook
Assignee (at issue)
DENSO 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.