Granted Patent
Utility
US 6,709,768 · App. 10/078,399
Magnetic recording medium and its manufacturing method and magnetic recording system using such a magnetic recording medium
Inventors:
Yoshio Takahashi, Kiwamu Tanahashi, Yuzuru Hosoe, Ichiro Tamai
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Feb 21, 2002
Inventors
Yoshio Takahashi
Kiwamu Tanahashi
Yuzuru Hosoe
Ichiro Tamai
Assignee (at issue)
Hitachi Global Storage Technologies 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.