Method and apparatus for generating a half-tone image representation with individual groups of one or more scanning beams controlled in response to half-tone dot information and either low-or high-resolution image data

Granted: Mar 3, 1987 Filed: Dec 26, 1984

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.