Granted Patent
Utility
US 6,323,487 · App. 09/237,309
IR optical position sensor system
Inventor:
Cunkai Wu
Patented Case
View Patent ↗
Granted: Nov 27, 2001
Filed: Jan 26, 1999
Inventor
Cunkai Wu
Assignee (at issue)
Delphi Technologies
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.