Granted Patent
Utility
US 4,937,682 · App. 07/290,773
Method and apparatus for providing contrast/intensity control in a document scanner
Inventor:
Dan L. Dalton
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Dec 28, 1988
Inventor
Dan L. Dalton
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.