Granted Patent
Utility
US 6,664,982 · App. 08/784,243
Multi-user on-screen keyboard
Inventor:
Depeng Bi
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Jan 15, 1997
Inventor
Depeng Bi
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.