Granted Patent
Utility
US 4,890,901 · App. 07/137,486
Color corrector for embedded prisms
Inventor:
Eugene W. Cross, Jr.
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Dec 22, 1987
Inventor
Eugene W. Cross, Jr.
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.