Granted Patent
Utility
US 6,100,822 · App. 09/034,170
Optical sensing system using multiple detectors at various positions for generating position signals
Inventor:
Shu-Ming Liu
Patented Case
View Patent ↗
Granted: Aug 8, 2000
Filed: Mar 2, 1998
Inventor
Shu-Ming Liu
Assignee (at issue)
Primax Electronics 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.