Granted Patent
Utility
US 4,820,321 · App. 07/085,048
Method and apparatus for fabricating an expanded beam cylindrically terminated optical fiber taper
Inventor:
Herman M. Presby
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Aug 13, 1987
Inventor
Herman M. Presby
Assignees (at issue)
American Telephone and Telegraph, Co.
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.