Granted Patent
Utility
US 4,803,558 · App. 03/929,622
Halftone image estimation methods for dither images
Inventors:
Seiichiro Hiratsuka, Masahiko Matsunawa, Yoshinori Abe
Patented Case
View Patent ↗
Granted: Feb 7, 1989
Filed: Nov 10, 1986
Inventors
Seiichiro Hiratsuka
Masahiko Matsunawa
Yoshinori Abe
Assignee (at issue)
Konishiroku Photo Industry 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.