Granted Patent
Utility
US 6,640,074 · App. 10/237,787
Developing system of liquid electrophotographic image forming device
Inventor:
Yong-su Kim
Patented Case
View Patent ↗
Granted: Oct 28, 2003
Filed: Sep 10, 2002
Inventor
Yong-su Kim
Assignee (at issue)
SAMSUNG DISPLAY CO., LTD.
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.