Granted Patent
Utility
US 4,920,501 · App. 07/259,940
Digital halftoning with minimum visual modulation patterns
Inventors:
James R. Sullivan, Rodney L. Miller
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: Oct 19, 1988
Inventors
James R. Sullivan
Rodney L. Miller
Assignee (at issue)
EASTMAN KODAK 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.