Granted Patent
Utility
US 6,777,634 · App. 10/122,023
Key-switch device corresponding to miniaturized notebook-size personal computer with reduced-thickness
Inventors:
Tsuyoshi Narusawa, Kazuhiro Yakoyama, Takayuki Ito, Sadayuki Yaginuma
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: Apr 11, 2002
Inventors
Tsuyoshi Narusawa
Kazuhiro Yakoyama
Takayuki Ito
Sadayuki Yaginuma
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.