Granted Patent
Utility
US 4,258,978 · App. 05/966,675
Image reversing array utilizing gradient refractive index elements
Inventor:
Henry B. Cole
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Dec 5, 1978
Inventor
Henry B. Cole
Assignee (at issue)
American Optical 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.