Granted Patent
Utility
US 6,238,825 · App. 09/442,839
Mask with alternating scattering bars
Inventor:
Benjamin Szu-Min Lin
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: Nov 18, 1999
Inventor
Benjamin Szu-Min Lin
Assignee (at issue)
UNITED MICROELECTORNICS CORP.
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.