Granted Patent
Utility
US 5,128,692 · App. 07/653,416
Symmetric binary weighted exposure method and apparatus employing center pulse width modulation for continuous tone printer
Inventor:
Michael L. Reisch
Patented Case
View Patent ↗
Granted: Jul 7, 1992
Filed: Feb 11, 1991
Inventor
Michael L. Reisch
Assignee (at issue)
Polaroid 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.