Granted Patent
Utility
US 5,228,893 · App. 07/799,224
Optical fiber tension monitoring technique
Inventors:
David H. Smithgall, Sr., Alan T. Woodward
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Nov 27, 1991
Inventors
David H. Smithgall, Sr.
Alan T. Woodward
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.