Granted Patent
Utility
US 6,561,668 · App. 09/754,692
Computer with keyboard illuminator for use in operating environments with inadequate ambient lighting conditions
Inventors:
Ken Katayama, Yukifumi Nakazawa, Yoshio Nishioka, Takahide Wada
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Jan 3, 2001
Inventors
Ken Katayama
Yukifumi Nakazawa
Yoshio Nishioka
Takahide Wada
Assignee (at issue)
International Business Machines 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.