Granted Patent
Utility
US 6,572,236 · App. 09/826,340
Back light unit, liquid crystal display, and method for manufacturing light guide plate
Inventors:
Masaru Suzuki, Yoshihiro Katsu
Patented Case
View Patent ↗
Granted: Jun 3, 2003
Filed: Apr 4, 2001
Inventors
Masaru Suzuki
Yoshihiro Katsu
Assignee (at issue)
International Business Machines Corporation
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.