Granted Patent
Utility
US 6,816,154 · App. 09/871,375
Optical sensor based user interface for a portable electronic device
Inventors:
Yoon Kean Wong, William Robert Hanson
Patented Case
View Patent ↗
Granted: Nov 9, 2004
Filed: May 30, 2001
Inventors
Yoon Kean Wong
William Robert Hanson
Assignee (at issue)
palmOne, Incorporated
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.