Granted Patent
Utility
US 4,601,740 · App. 06/682,975
Methods of and apparatus for at least partially closing an end portion of an optical preform tube
Inventors:
Brian Lynch, William D. O'Brien, Jr.
Patented Case
View Patent ↗
Granted: Jul 22, 1986
Filed: Dec 18, 1984
Inventors
Brian Lynch
William D. O'Brien, Jr.
Assignee (at issue)
AT&T Technologies Incorporated
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.