Granted Patent
Utility
US 4,486,214 · App. 06/559,603
Methods of and apparatus for collapsing a preform tube into a preform from which lightguide fiber is drawn
Inventors:
Brian Lynch, John B. MacChesney, Fred P. Partus, Jay R. Simpson
Patented Case
View Patent ↗
Granted: Dec 4, 1984
Filed: Dec 8, 1983
Inventors
Brian Lynch
John B. MacChesney
Fred P. Partus
Jay R. Simpson
Assignees (at issue)
AT&T Technologies Incorporated
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.