Granted Patent
Utility
US 5,685,652 · App. 08/574,004
Method of preparing threshold matrix and method of and apparatus for generating halftone image
Inventor:
Hiroshi Asai
Patented Case
View Patent ↗
Granted: Nov 11, 1997
Filed: Dec 18, 1995
Inventor
Hiroshi Asai
Assignee (at issue)
DAINIPPON SCREEN MFG. CO., LTD.
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.