Granted Patent
Utility
US 6,132,652 · App. 08/742,500
Method of producing lightguide plate for surface light source, lightguide plate for surface light source and surface light source using the same
Inventors:
Masahiro Higuchi, Takanari Kusafuka, Yoshiaki Maeno
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Nov 1, 1996
Inventors
Masahiro Higuchi
Takanari Kusafuka
Yoshiaki Maeno
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.