Granted Patent
Utility
US 6,569,791 · App. 09/616,039
Glass-ceramic composition for recording disk substrate
Inventors:
Hideki Nagata, Toshiharu Mori, Hiroshi Yuki, Hideki Kawai, Akira Sugimoto, Kazuhiko Ishimaru
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Jul 13, 2000
Inventors
Hideki Nagata
Toshiharu Mori
Hiroshi Yuki
Hideki Kawai
Akira Sugimoto
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.