Granted Patent
Utility
US 5,625,499 · App. 08/590,963
Achromatic and apochromatic prism element employing prisms and gratings
Inventor:
Chungte W. Chen
Patented Case
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Granted: Apr 29, 1997
Filed: Jan 24, 1996
Inventor
Chungte W. Chen
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.