Granted Patent
Utility
US 6,683,601 · App. 09/842,186
Electronic apparatus including pen
Inventor:
Kazuo Okamoto
Patented Case
View Patent ↗
Granted: Jan 27, 2004
Filed: Jul 20, 2001
Inventor
Kazuo Okamoto
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.