Granted Patent
Utility
US 4,579,253 · App. 06/296,970
Toner control system
Inventor:
Richard S. Shenier
Patented Case
View Patent ↗
Granted: Apr 1, 1986
Filed: Aug 27, 1981
Inventor
Richard S. Shenier
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.