Granted Patent
Utility
US 6,561,664 · App. 09/824,773
Sheet-like light source device
Inventors:
Shigeru Yachi, Atsushi Itoh
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Apr 4, 2001
Inventors
Shigeru Yachi
Atsushi Itoh
Assignee (at issue)
Advanced Display, Inc.
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.