Granted Patent
Utility
US 5,491,573 · App. 08/284,514
Optical signal transmission network
Inventor:
Simon P. Shipley
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: Sep 19, 1994
Inventor
Simon P. Shipley
Assignee (at issue)
GPT 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.