Granted Patent
Utility
US 6,434,227 · App. 08/834,836
Exchange for providing service functions for given periods of time
Inventor:
Toshio Nakamura
Patented Case
View Patent ↗
Granted: Aug 13, 2002
Filed: Apr 10, 1997
Inventor
Toshio 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.