Granted Patent
Utility
US 6,514,890 · App. 09/610,618
Glass-ceramic composition for recording disk substrate
Inventors:
Hideki Nagata, Hideki Kawai, Toshiharu Mori, Hiroshi Yuki, Kazuhiko Ishimaru
Patented Case
View Patent ↗
Granted: Feb 4, 2003
Filed: Jul 5, 2000
Inventors
Hideki Nagata
Hideki Kawai
Toshiharu Mori
Hiroshi Yuki
Kazuhiko Ishimaru
Assignee (at issue)
Minolta 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.