Granted Patent
Utility
US 5,416,863 · App. 08/176,362
Mode-field transforming optical waveguide
Inventor:
Ashish Madhukar Vengsarkar
Patented Case
View Patent ↗
Granted: May 16, 1995
Filed: Dec 30, 1993
Inventor
Ashish Madhukar Vengsarkar
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.