Granted Patent
Utility
US 5,526,438 · App. 08/345,289
Digital halftone rendering of a gray scale image with frequency dependent diagonal correlation
Inventor:
David Barton
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Nov 28, 1994
Inventor
David Barton
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.