Granted Patent
Utility
US 4,556,280 · App. 06/531,933
Single cable optical fibre signaling system
Inventor:
Robert J. Bagby
Patented Case
View Patent ↗
Granted: Dec 3, 1985
Filed: Sep 13, 1983
Inventor
Robert J. Bagby
Assignee (at issue)
United States Riley Corporation
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.