Granted Patent
Utility
US 6,819,781 · App. 09/106,878
Method and apparatus for optical sensor system and optical interface circuit
Inventor:
Joseph A. Simpkins
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Jun 30, 1998
Inventor
Joseph A. Simpkins
Assignee (at issue)
Mars, 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.