Granted Patent
Utility
US 6,733,957 · App. 10/026,699
Disk substrate and manufacturing method therefor, and disk manufactured by the disk substrate
Inventors:
Toyohito Asanuma, Kenichi Shimomai
Patented Case
View Patent ↗
Granted: May 11, 2004
Filed: Dec 27, 2001
Inventors
Toyohito Asanuma
Kenichi Shimomai
Assignee (at issue)
Victor Company of Japan, 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.