Granted Patent
Utility
US 4,705,350 · App. 06/777,952
Optical transmission network
Inventor:
Steven S. Cheng
Patented Case
View Patent ↗
Granted: Nov 10, 1987
Filed: Sep 19, 1985
Inventor
Steven S. Cheng
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.