Granted Patent
Utility
US 4,276,072 · App. 05/804,208
Optical fiber fabrication
Inventor:
Brian Boru O'Brien
Patented Case
View Patent ↗
Granted: Jun 30, 1981
Filed: Jun 7, 1977
Inventor
Brian Boru O'Brien
Assignee (at issue)
International Telephone and Telegraph 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.