Granted Patent
Utility
US 6,418,159 · App. 09/117,842
Portable radio telephone equipment and control thereof
Inventor:
Yuji Umemoto
Patented Case
View Patent ↗
Granted: Jul 9, 2002
Filed: Aug 6, 1998
Inventor
Yuji Umemoto
Assignee (at issue)
Kabushiki Kaisha Toshiba
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.