Granted Patent
Utility
US 6,284,988 · App. 09/487,817
Keyboard apparatus the operation side of which can be illuminated
Inventors:
Kazutoshi Watanabe, Kazuhiro Yokoyama, Katsuyuki Suzuki, Satoru Takemori
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Jan 18, 2000
Inventors
Kazutoshi Watanabe
Kazuhiro Yokoyama
Katsuyuki Suzuki
Satoru Takemori
Assignee (at issue)
ALPS ELECTRIC CO., LTD.
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.