Granted Patent
Utility
US 6,211,475 · App. 09/482,078
Keyboard with key lock function
Inventor:
Akiyo Ozaki
Patented Case
View Patent ↗
Granted: Apr 3, 2001
Filed: Jan 13, 2000
Inventor
Akiyo Ozaki
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.