Granted Patent
Utility
US 4,764,002 · App. 07/108,067
Balanced optical system
Inventor:
Andrew Wilson
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Oct 14, 1987
Inventor
Andrew Wilson
Assignee (at issue)
Ferranti plc
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.