Granted Patent
Utility
US 5,999,685 · App. 08/921,606
Light guide plate and surface light source using the light guide plate
Inventors:
Youichiro Goto, Michiaki Sato, Yasuko Teragaki, Katsutoshi Hibino, Kenji Torazawa, Masahiro Higuchi, Takanari Kusafuka
Patented Case
View Patent ↗
Granted: Dec 7, 1999
Filed: Sep 2, 1997
Inventors
Youichiro Goto
Michiaki Sato
Yasuko Teragaki
Katsutoshi Hibino
Kenji Torazawa
Masahiro Higuchi
Takanari Kusafuka
Assignee (at issue)
SANYO ELECTRIC 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.