Granted Patent
Utility
US 6,728,519 · App. 09/669,893
Portable input device
Inventor:
Tatsumi Okuda
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Sep 27, 2000
Inventor
Tatsumi Okuda
Assignee (at issue)
SANYO 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.