Granted Patent
Utility
US 4,985,779 · App. 07/409,114
Improved method and apparatus for generating halftone images
Inventor:
Winrich Gall
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Sep 19, 1989
Inventor
Winrich Gall
Assignee (at issue)
Intergraph Corporation
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.