Granted Patent
Utility
US 5,604,829 · App. 08/423,070
Optical waveguide with diffraction grating and method of forming the same
Inventor:
Hans W. Bruesselbach
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: Apr 17, 1995
Inventor
Hans W. Bruesselbach
Assignee (at issue)
Hughes Aircraft Company
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.