Granted Patent
Utility
US 6,673,474 · App. 09/818,764
Medium substrate, production method thereof and magnetic disk device
Inventor:
Kenrou Yamamoto
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Mar 27, 2001
Inventor
Kenrou Yamamoto
Assignee (at issue)
Fujitsu Limited
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.