Granted Patent
Utility
US 5,640,469 · App. 07/415,048
Systems and methods for producing high-contrast, intensity equalized visible images
Inventors:
Lloyd J. Lewins, Peter V. Messina
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Sep 28, 1989
Inventors
Lloyd J. Lewins
Peter V. Messina
Assignee (at issue)
HUGHES ELECTRONICS LIMITED
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.