Granted Patent
Utility
US 5,825,553 · App. 08/159,006
Eyepiece design
Inventor:
Chungte W. Chen
Patented Case
View Patent ↗
Granted: Oct 20, 1998
Filed: Nov 29, 1993
Inventor
Chungte W. Chen
Assignee (at issue)
Hughes Aircraft Company now known as Ragtheon 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.