Granted Patent
Utility
US 4,996,420 · App. 07/417,370
Measurement of optical attenuation along the length of bent optical fibers
Inventor:
Gary R. Redford
Patented Case
View Patent ↗
Granted: Feb 26, 1991
Filed: Oct 5, 1989
Inventor
Gary R. Redford
Assignee (at issue)
Hughes Aircraft Company
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.