Granted Patent
Utility
US 4,887,902 · App. 07/154,705
Optical transducer
Inventor:
Alexander Skinner
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Feb 11, 1988
Inventor
Alexander Skinner
Assignee (at issue)
Plessey Overseas 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.