Granted Patent
Utility
US 6,720,578 · App. 10/298,571
Polycrystalline silicon thin film for a thin film transistor and display device using the same
Inventor:
Ki-Yong Lee
Patented Case
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Granted: Apr 13, 2004
Filed: Nov 19, 2002
Inventor
Ki-Yong Lee
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.