Granted Patent
Utility
US 5,897,240 · App. 09/094,553
Concentration measuring device of electrographic printer
Inventor:
Yong-baek Yoo
Patented Case
View Patent ↗
Granted: Apr 27, 1999
Filed: Jun 15, 1998
Inventor
Yong-baek Yoo
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.