Granted Patent
Utility
US 4,756,986 · App. 06/903,368
Mixed pigment system for modulation of toner gamma
Inventor:
George A. Gibson
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: Sep 3, 1986
Inventor
George A. Gibson
Assignee (at issue)
Savin 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.