Granted Patent
Utility
US 4,383,843 · App. 06/302,933
Methods of and apparatus for heating a preform from which lightguide fiber is drawn
Inventor:
Rama Iyengar
Patented Case
View Patent ↗
Granted: May 17, 1983
Filed: Sep 16, 1981
Inventor
Rama Iyengar
Assignee (at issue)
Western Electric Company, Inc.
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.