Granted Patent
Utility
US 6,526,040 · App. 09/332,966
Exchange network system
Inventor:
Teruo Nakamura
Patented Case
View Patent ↗
Granted: Feb 25, 2003
Filed: Jun 15, 1999
Inventor
Teruo Nakamura
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.