Granted Patent
Utility
US 6,139,207 · App. 09/313,633
Keyboard apparatus
Inventor:
Shigeru Kawabe
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: May 18, 1999
Inventor
Shigeru Kawabe
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.