Granted Patent
Utility
US 6,316,071 · App. 09/379,111
Substrate for digital versatile disk and process for producing the same
Inventors:
Munehiro Chosa, Masaya Okamoto, Yasuhiro Ishikawa
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Aug 23, 1999
Inventors
Munehiro Chosa
Masaya Okamoto
Yasuhiro Ishikawa
Assignee (at issue)
Idemitsu Petrochemical 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.