Granted Patent
Utility
US 6,836,403 · App. 10/294,620
PDA and button apparatus of PDA
Inventor:
Chun-Yu Hsu
Patented Case
View Patent ↗
Granted: Dec 28, 2004
Filed: Nov 15, 2002
Inventor
Chun-Yu Hsu
Assignee (at issue)
Lite-On Technology Corporation
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.