Granted Patent
Utility
US 5,467,415 · App. 08/231,529
Method for making polarization independent silica optical circuits
Inventor:
Herman M. Presby
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: Apr 22, 1994
Inventor
Herman M. Presby
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.