Granted Patent
Utility
US 6,573,825 · App. 09/472,780
Communication apparatus and alerting method
Inventor:
Yoichi Okano
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Dec 27, 1999
Inventor
Yoichi Okano
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.