Granted Patent
Utility
US 5,840,395 · App. 08/666,481
Optical information recording medium and method for producing same
Inventors:
Kazumi Sawada, Yoshihiro Shigemori
Patented Case
View Patent ↗
Granted: Nov 24, 1998
Filed: Sep 12, 1996
Inventors
Kazumi Sawada
Yoshihiro Shigemori
Assignee (at issue)
Sony Disc Technology 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.