Granted Patent
Utility
US 5,680,231 · App. 08/465,848
Holographic lenses with wide angular and spectral bandwidths for use in a color display device
Inventors:
Jan Grinberg, Anson Au, Chiung-Sheng Wu
Patented Case
View Patent ↗
Granted: Oct 21, 1997
Filed: Jun 6, 1995
Inventors
Jan Grinberg
Anson Au
Chiung-Sheng Wu
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.