Granted Patent
Utility
US 4,566,754 · App. 06/361,093
Optical fibres
Inventors:
Keith J. Beales, Clive R. Day, Benjamin J. Ainslie, James D. Rush
Patented Case
View Patent ↗
Granted: Jan 28, 1986
Filed: Mar 23, 1982
Inventors
Keith J. Beales
Clive R. Day
Benjamin J. Ainslie
James D. Rush
Assignee (at issue)
British Telecommunications PLC
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.