Granted Patent
Utility
US 5,817,422 · App. 08/795,984
Optical apparatus having a highly diffusive metal surface layer
Inventor:
Darell E. Engelhaupt
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Feb 5, 1997
Inventor
Darell E. Engelhaupt
Assignee (at issue)
LOCKHEED MARTIN CORPORATION
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.