Granted Patent
Utility
US 5,491,574 · App. 08/496,659
Optical signal transmission network
Inventor:
Simon P. Shipley
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: Jun 29, 1995
Inventor
Simon P. Shipley
Assignee (at issue)
GEC-Marconi Ltd.
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.