Granted Patent
Utility
US 5,236,648 · App. 07/770,389
Method of manufacturing a reference member for calibrating toner concentration monitors in electrophotographic document production apparatus
Inventors:
Dilip K. Chatterjee, Matthias H. Regelsberger
Patented Case
View Patent ↗
Granted: Aug 17, 1993
Filed: Oct 3, 1991
Inventors
Dilip K. Chatterjee
Matthias H. Regelsberger
Assignee (at issue)
EASTMAN KODAK COMPANY
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.