Granted Patent
Utility
US 6,664,901 · App. 09/506,869
Keyboard input device
Inventors:
Naoki Yamada, Satoru Takemori
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Feb 15, 2000
Inventors
Naoki Yamada
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.