Granted Patent
Utility
US 6,823,747 · App. 10/376,751
Capacitive sensor
Inventors:
Kazuo Hasegawa, Katsuyuki Ishiguro, Yasuichi Ono, Daiichi Hashimoto
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Feb 28, 2003
Inventors
Kazuo Hasegawa
Katsuyuki Ishiguro
Yasuichi Ono
Daiichi Hashimoto
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.