Granted Patent
Utility
US 6,738,642 · App. 09/546,825
Communication device and method of operating communication device
Inventor:
Tadashi Tsukamoto
Patented Case
View Patent ↗
Granted: May 18, 2004
Filed: Apr 11, 2000
Inventor
Tadashi Tsukamoto
Assignee (at issue)
NEC 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.