Granted Patent
Utility
US 4,904,086 · App. 07/293,933
Light alignment detection device
Inventor:
Paul E. G. Cope
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Jan 5, 1989
Inventor
Paul E. G. Cope
Assignee (at issue)
The Marconi Company Limited
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.