Granted Patent
Utility
US 5,448,674 · App. 08/197,379
Article comprising a dispersion-compensating optical waveguide
Inventors:
Ashish Madhukar Vengsarkar, Kenneth L. Walker
Patented Case
View Patent ↗
Granted: Sep 5, 1995
Filed: Feb 16, 1994
Inventors
Ashish Madhukar Vengsarkar
Kenneth L. Walker
Assignee (at issue)
AT&T CORP.
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.