Granted Patent
Utility
US 4,932,990 · App. 07/410,004
Methods of making optical fiber and products produced thereby
Inventors:
Michael M. Michie, Quang D. Nguyen, Albert John Ritger
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Sep 19, 1989
Inventors
Michael M. Michie
Quang D. Nguyen
Albert John Ritger
Assignee (at issue)
AT&T Bell Laboratories
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.