Granted Patent
Utility
US 6,559,908 · App. 10/076,694
Direct-light-type planar light source apparatus and liquid crystal display device
Inventors:
Kohji Hiratsuka, Fumihisa Hanzawa
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Feb 14, 2002
Inventors
Kohji Hiratsuka
Fumihisa Hanzawa
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.