Granted Patent
Utility
US 4,956,668 · App. 07/214,967
Developer mix monitoring for replaceable developer stations
Inventors:
Kenneth A. Arnold, Wunan Chang, Kelly S. Robinson
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: Jul 5, 1988
Inventors
Kenneth A. Arnold
Wunan Chang
Kelly S. Robinson
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.