Granted Patent
Utility
US 4,888,785 · App. 07/146,217
Miniature integrated optical beam splitter
Inventor:
Tien P. Lee
Patented Case
View Patent ↗
Granted: Dec 19, 1989
Filed: Jan 19, 1988
Inventor
Tien P. Lee
Assignee (at issue)
Bell Communications Research, Inc.
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.