Granted Patent
Utility
US 5,170,403 · App. 07/708,163
Modulation circuit for grayscale laser printing
Inventor:
Christopher Mayer
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: May 31, 1991
Inventor
Christopher Mayer
Assignee (at issue)
Digital Equipment 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.