Granted Patent
Utility
US 5,090,790 · App. 07/546,321
Polarization-independent semiconductor waveguide
Inventor:
Jane E. Zucker
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Jun 29, 1990
Inventor
Jane E. Zucker
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.